diff --git a/core/includes/common.inc b/core/includes/common.inc
index 240f644a154ebca2b0ef5bc3e37ac7bfdaa26040..0b1774696fb978dad145e6c8f907b9a33b7a420d 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -7797,10 +7797,9 @@ function archiver_get_archiver($file) {
  * file system, for example to update modules that have newer releases, or to
  * install a new theme.
  *
- * @return array
+ * @return
  *   The Drupal Updater class registry.
  *
- * @see Drupal\Core\Updater\Updater
  * @see hook_updater_info()
  * @see hook_updater_info_alter()
  */
diff --git a/core/includes/updater.inc b/core/includes/updater.inc
new file mode 100644
index 0000000000000000000000000000000000000000..d4f99e9741a646ca3448a451adba3121908f416b
--- /dev/null
+++ b/core/includes/updater.inc
@@ -0,0 +1,427 @@
+<?php
+
+/**
+ * @file
+ * Classes used for updating various files in the Drupal webroot. These
+ * classes use a FileTransfer object to actually perform the operations.
+ * Normally, the FileTransfer is provided when the site owner is redirected to
+ * authorize.php as part of a multistep process.
+ */
+
+/**
+ * Interface for a class which can update a Drupal project.
+ *
+ * An Updater currently serves the following purposes:
+ *   - It can take a given directory, and determine if it can operate on it.
+ *   - It can move the contents of that directory into the appropriate place
+ *     on the system using FileTransfer classes.
+ *   - It can return a list of "next steps" after an update or install.
+ *   - In the future, it will most likely perform some of those steps as well.
+ */
+interface DrupalUpdaterInterface {
+
+  /**
+   * Checks if the project is installed.
+   *
+   * @return bool
+   */
+  public function isInstalled();
+
+  /**
+   * Returns the system name of the project.
+   *
+   * @param string $directory
+   *  A directory containing a project.
+   */
+  public static function getProjectName($directory);
+
+  /**
+   * @return string
+   *   An absolute path to the default install location.
+   */
+  public function getInstallDirectory();
+
+  /**
+   * Determine if the Updater can handle the project provided in $directory.
+   *
+   * @todo: Provide something more rational here, like a project spec file.
+   *
+   * @param string $directory
+   *
+   * @return bool
+   *   TRUE if the project is installed, FALSE if not.
+   */
+  public static function canUpdateDirectory($directory);
+
+  /**
+   * Actions to run after an install has occurred.
+   */
+  public function postInstall();
+
+  /**
+   * Actions to run after an update has occurred.
+   */
+  public function postUpdate();
+}
+
+/**
+ * Base class for Updaters used in Drupal.
+ */
+class Updater {
+
+  /**
+   * @var string $source Directory to install from.
+   */
+  public $source;
+
+  public function __construct($source) {
+    $this->source = $source;
+    $this->name = self::getProjectName($source);
+    $this->title = self::getProjectTitle($source);
+  }
+
+  /**
+   * Return an Updater of the appropriate type depending on the source.
+   *
+   * If a directory is provided which contains a module, will return a
+   * ModuleUpdater.
+   *
+   * @param string $source
+   *   Directory of a Drupal project.
+   *
+   * @return Updater
+   */
+  public static function factory($source) {
+    if (is_dir($source)) {
+      $updater = self::getUpdaterFromDirectory($source);
+    }
+    else {
+      throw new UpdaterException(t('Unable to determine the type of the source directory.'));
+    }
+    return new $updater($source);
+  }
+
+  /**
+   * Determine which Updater class can operate on the given directory.
+   *
+   * @param string $directory
+   *   Extracted Drupal project.
+   *
+   * @return string
+   *   The class name which can work with this project type.
+   */
+  public static function getUpdaterFromDirectory($directory) {
+    // Gets a list of possible implementing classes.
+    $updaters = drupal_get_updaters();
+    foreach ($updaters as $updater) {
+      $class = $updater['class'];
+      if (call_user_func(array($class, 'canUpdateDirectory'), $directory)) {
+        return $class;
+      }
+    }
+    throw new UpdaterException(t('Cannot determine the type of project.'));
+  }
+
+  /**
+   * Figure out what the most important (or only) info file is in a directory.
+   *
+   * Since there is no enforcement of which info file is the project's "main"
+   * info file, this will get one with the same name as the directory, or the
+   * first one it finds.  Not ideal, but needs a larger solution.
+   *
+   * @param string $directory
+   *   Directory to search in.
+   *
+   * @return string
+   *   Path to the info file.
+   */
+  public static function findInfoFile($directory) {
+    $info_files = file_scan_directory($directory, '/.*\.info$/');
+    if (!$info_files) {
+      return FALSE;
+    }
+    foreach ($info_files as $info_file) {
+      if (drupal_substr($info_file->filename, 0, -5) == drupal_basename($directory)) {
+        // Info file Has the same name as the directory, return it.
+        return $info_file->uri;
+      }
+    }
+    // Otherwise, return the first one.
+    $info_file = array_shift($info_files);
+    return $info_file->uri;
+  }
+
+  /**
+   * Get the name of the project directory (basename).
+   *
+   * @todo: It would be nice, if projects contained an info file which could
+   *        provide their canonical name.
+   *
+   * @param string $directory
+   *
+   * @return string
+   *   The name of the project.
+   */
+  public static function getProjectName($directory) {
+    return drupal_basename($directory);
+  }
+
+  /**
+   * Return the project name from a Drupal info file.
+   *
+   * @param string $directory
+   *   Directory to search for the info file.
+   *
+   * @return string
+   *   The title of the project.
+   */
+  public static function getProjectTitle($directory) {
+    $info_file = self::findInfoFile($directory);
+    $info = drupal_parse_info_file($info_file);
+    if (empty($info)) {
+      throw new UpdaterException(t('Unable to parse info file: %info_file.', array('%info_file' => $info_file)));
+    }
+    if (empty($info['name'])) {
+      throw new UpdaterException(t("The info file (%info_file) does not define a 'name' attribute.", array('%info_file' => $info_file)));
+    }
+    return $info['name'];
+  }
+
+  /**
+   * Store the default parameters for the Updater.
+   *
+   * @param array $overrides
+   *   An array of overrides for the default parameters.
+   *
+   * @return array
+   *   An array of configuration parameters for an update or install operation.
+   */
+  protected function getInstallArgs($overrides = array()) {
+    $args = array(
+      'make_backup' => FALSE,
+      'install_dir' => $this->getInstallDirectory(),
+      'backup_dir'  => $this->getBackupDir(),
+    );
+    return array_merge($args, $overrides);
+  }
+
+  /**
+   * Updates a Drupal project, returns a list of next actions.
+   *
+   * @param FileTransfer $filetransfer
+   *   Object that is a child of FileTransfer. Used for moving files
+   *   to the server.
+   * @param array $overrides
+   *   An array of settings to override defaults; see self::getInstallArgs().
+   *
+   * @return array
+   *   An array of links which the user may need to complete the update
+   */
+  public function update(&$filetransfer, $overrides = array()) {
+    try {
+      // Establish arguments with possible overrides.
+      $args = $this->getInstallArgs($overrides);
+
+      // Take a Backup.
+      if ($args['make_backup']) {
+        $this->makeBackup($args['install_dir'], $args['backup_dir']);
+      }
+
+      if (!$this->name) {
+        // This is bad, don't want to delete the install directory.
+        throw new UpdaterException(t('Fatal error in update, cowardly refusing to wipe out the install directory.'));
+      }
+
+      // Make sure the installation parent directory exists and is writable.
+      $this->prepareInstallDirectory($filetransfer, $args['install_dir']);
+
+      // Note: If the project is installed in sites/all, it will not be
+      // deleted. It will be installed in sites/default as that will override
+      // the sites/all reference and not break other sites which are using it.
+      if (is_dir($args['install_dir'] . '/' . $this->name)) {
+        // Remove the existing installed file.
+        $filetransfer->removeDirectory($args['install_dir'] . '/' . $this->name);
+      }
+
+      // Copy the directory in place.
+      $filetransfer->copyDirectory($this->source, $args['install_dir']);
+
+      // Make sure what we just installed is readable by the web server.
+      $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);
+
+      // Run the updates.
+      // @TODO: decide if we want to implement this.
+      $this->postUpdate();
+
+      // For now, just return a list of links of things to do.
+      return $this->postUpdateTasks();
+    }
+    catch (FileTransferException $e) {
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: !reason', array('!reason' => strtr($e->getMessage(), $e->arguments))));
+    }
+  }
+
+  /**
+   * Installs a Drupal project, returns a list of next actions.
+   *
+   * @param FileTransfer $filetransfer
+   *   Object that is a child of FileTransfer.
+   * @param array $overrides
+   *   An array of settings to override defaults; see self::getInstallArgs().
+   *
+   * @return array
+   *   An array of links which the user may need to complete the install.
+   */
+  public function install(&$filetransfer, $overrides = array()) {
+    try {
+      // Establish arguments with possible overrides.
+      $args = $this->getInstallArgs($overrides);
+
+      // Make sure the installation parent directory exists and is writable.
+      $this->prepareInstallDirectory($filetransfer, $args['install_dir']);
+
+      // Copy the directory in place.
+      $filetransfer->copyDirectory($this->source, $args['install_dir']);
+
+      // Make sure what we just installed is readable by the web server.
+      $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);
+
+      // Potentially enable something?
+      // @TODO: decide if we want to implement this.
+      $this->postInstall();
+      // For now, just return a list of links of things to do.
+      return $this->postInstallTasks();
+    }
+    catch (FileTransferException $e) {
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: !reason', array('!reason' => strtr($e->getMessage(), $e->arguments))));
+    }
+  }
+
+  /**
+   * Make sure the installation parent directory exists and is writable.
+   *
+   * @param FileTransfer $filetransfer
+   *   Object which is a child of FileTransfer.
+   * @param string $directory
+   *   The installation directory to prepare.
+   */
+  public function prepareInstallDirectory(&$filetransfer, $directory) {
+    // Make the parent dir writable if need be and create the dir.
+    if (!is_dir($directory)) {
+      $parent_dir = dirname($directory);
+      if (!is_writable($parent_dir)) {
+        @chmod($parent_dir, 0755);
+        // It is expected that this will fail if the directory is owned by the
+        // FTP user. If the FTP user == web server, it will succeed.
+        try {
+          $filetransfer->createDirectory($directory);
+          $this->makeWorldReadable($filetransfer, $directory);
+        }
+        catch (FileTransferException $e) {
+          // Probably still not writable. Try to chmod and do it again.
+          // @todo: Make a new exception class so we can catch it differently.
+          try {
+            $old_perms = substr(sprintf('%o', fileperms($parent_dir)), -4);
+            $filetransfer->chmod($parent_dir, 0755);
+            $filetransfer->createDirectory($directory);
+            $this->makeWorldReadable($filetransfer, $directory);
+            // Put the permissions back.
+            $filetransfer->chmod($parent_dir, intval($old_perms, 8));
+          }
+          catch (FileTransferException $e) {
+            $message = t($e->getMessage(), $e->arguments);
+            $throw_message = t('Unable to create %directory due to the following: %reason', array('%directory' => $directory, '%reason' => $message));
+            throw new UpdaterException($throw_message);
+          }
+        }
+        // Put the parent directory back.
+        @chmod($parent_dir, 0555);
+      }
+    }
+  }
+
+  /**
+   * Ensure that a given directory is world readable.
+   *
+   * @param FileTransfer $filetransfer
+   *   Object which is a child of FileTransfer.
+   * @param string $path
+   *   The file path to make world readable.
+   * @param bool $recursive
+   *   If the chmod should be applied recursively.
+   */
+  public function makeWorldReadable(&$filetransfer, $path, $recursive = TRUE) {
+    if (!is_executable($path)) {
+      // Set it to read + execute.
+      $new_perms = substr(sprintf('%o', fileperms($path)), -4, -1) . "5";
+      $filetransfer->chmod($path, intval($new_perms, 8), $recursive);
+    }
+  }
+
+  /**
+   * Perform a backup.
+   *
+   * @todo Not implemented.
+   */
+  public function makeBackup(&$filetransfer, $from, $to) {
+  }
+
+  /**
+   * Return the full path to a directory where backups should be written.
+   */
+  public function getBackupDir() {
+    return file_stream_wrapper_get_instance_by_scheme('temporary')->getDirectoryPath();
+  }
+
+  /**
+   * Perform actions after new code is updated.
+   */
+  public function postUpdate() {
+  }
+
+  /**
+   * Perform actions after installation.
+   */
+  public function postInstall() {
+  }
+
+  /**
+   * Return an array of links to pages that should be visited post operation.
+   *
+   * @return array
+   *   Links which provide actions to take after the install is finished.
+   */
+  public function postInstallTasks() {
+    return array();
+  }
+
+  /**
+   * Return an array of links to pages that should be visited post operation.
+   *
+   * @return array
+   *   Links which provide actions to take after the update is finished.
+   */
+  public function postUpdateTasks() {
+    return array();
+  }
+}
+
+/**
+ * Exception class for the Updater class hierarchy.
+ *
+ * This is identical to the base Exception class, we just give it a more
+ * specific name so that call sites that want to tell the difference can
+ * specifically catch these exceptions and treat them differently.
+ */
+class UpdaterException extends Exception {
+}
+
+/**
+ * Child class of UpdaterException that indicates a FileTransfer exception.
+ *
+ * We have to catch FileTransfer exceptions and wrap those in t(), since
+ * FileTransfer is so low-level that it doesn't use any Drupal APIs and none
+ * of the strings are translated.
+ */
+class UpdaterFileTransferException extends UpdaterException {
+}
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index e1d5298eab42387bc31cb4d948721713af599fb5..eac29fefcf2b4477e2e08e32aaf4cde3061f12ca 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -4042,9 +4042,9 @@ function hook_batch_alter(&$batch) {
 /**
  * Provide information on Updaters (classes that can update Drupal).
  *
- * Drupal\Core\Updater\Updater is a class that knows how to update various parts
- * of the Drupal file system, for example to update modules that have newer
- * releases, or to install a new theme.
+ * An Updater is a class that knows how to update various parts of the Drupal
+ * file system, for example to update modules that have newer releases, or to
+ * install a new theme.
  *
  * @return
  *   An associative array of information about the updater(s) being provided.
@@ -4066,12 +4066,12 @@ function hook_batch_alter(&$batch) {
 function hook_updater_info() {
   return array(
     'module' => array(
-      'class' => 'Drupal\Core\Updater\Module',
+      'class' => 'ModuleUpdater',
       'name' => t('Update modules'),
       'weight' => 0,
     ),
     'theme' => array(
-      'class' => 'Drupal\Core\Updater\Theme',
+      'class' => 'ThemeUpdater',
       'name' => t('Update themes'),
       'weight' => 0,
     ),
diff --git a/core/modules/system/system.info b/core/modules/system/system.info
index d95d5611f10f4114361f9d1bd5e634ffdff88f73..c394849e73bbd32c97a6bfd74c8b8862d124b939 100644
--- a/core/modules/system/system.info
+++ b/core/modules/system/system.info
@@ -7,6 +7,7 @@ files[] = system.archiver.inc
 files[] = system.mail.inc
 files[] = system.queue.inc
 files[] = system.tar.inc
+files[] = system.updater.inc
 files[] = system.test
 required = TRUE
 configure = admin/config/system
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 469f996655d0c251110080dad53566f1569c8e04..14e73f5a45a42ab329e589fdef13e36be70c483c 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1862,12 +1862,12 @@ function system_authorized_batch_process() {
 function system_updater_info() {
   return array(
     'module' => array(
-      'class' => 'Drupal\Core\Updater\Module',
+      'class' => 'ModuleUpdater',
       'name' => t('Update modules'),
       'weight' => 0,
     ),
     'theme' => array(
-      'class' => 'Drupal\Core\Updater\Theme',
+      'class' => 'ThemeUpdater',
       'name' => t('Update themes'),
       'weight' => 0,
     ),
diff --git a/core/modules/system/system.updater.inc b/core/modules/system/system.updater.inc
new file mode 100644
index 0000000000000000000000000000000000000000..84c1752d3bf6aa1b047ff949edbb0d78c8b58c87
--- /dev/null
+++ b/core/modules/system/system.updater.inc
@@ -0,0 +1,146 @@
+<?php
+
+/**
+ * @file
+ * Subclasses of the Updater class to update Drupal core knows how to update.
+ * At this time, only modules and themes are supported.
+ */
+
+/**
+ * Class for updating modules using FileTransfer classes via authorize.php.
+ */
+class ModuleUpdater extends Updater implements DrupalUpdaterInterface {
+
+  /**
+   * Return the directory where a module should be installed.
+   *
+   * If the module is already installed, drupal_get_path() will return
+   * a valid path and we should install it there (although we need to use an
+   * absolute path, so we prepend DRUPAL_ROOT). If we're installing a new
+   * module, we always want it to go into sites/all/modules, since that's
+   * where all the documentation recommends users install their modules, and
+   * there's no way that can conflict on a multi-site installation, since
+   * the Update manager won't let you install a new module if it's already
+   * found on your system, and if there was a copy in sites/all, we'd see it.
+   */
+  public function getInstallDirectory() {
+    if ($relative_path = drupal_get_path('module', $this->name)) {
+      $relative_path = dirname($relative_path);
+    }
+    else {
+      $relative_path = 'sites/all/modules';
+    }
+    return DRUPAL_ROOT . '/' . $relative_path;
+  }
+
+  public function isInstalled() {
+    return (bool) drupal_get_path('module', $this->name);
+  }
+
+  public static function canUpdateDirectory($directory) {
+    if (file_scan_directory($directory, '/.*\.module$/')) {
+      return TRUE;
+    }
+    return FALSE;
+  }
+
+  public static function canUpdate($project_name) {
+    return (bool) drupal_get_path('module', $project_name);
+  }
+
+  /**
+   * Return available database schema updates one a new version is installed.
+   */
+  public function getSchemaUpdates() {
+    require_once DRUPAL_ROOT . '/core/includes/install.inc';
+    require_once DRUPAL_ROOT . '/core/includes/update.inc';
+
+    if (_update_get_project_type($project) != 'module') {
+      return array();
+    }
+    module_load_include('install', $project);
+
+    if (!$updates = drupal_get_schema_versions($project)) {
+      return array();
+    }
+    $updates_to_run = array();
+    $modules_with_updates = update_get_update_list();
+    if ($updates = $modules_with_updates[$project]) {
+      if ($updates['start']) {
+        return $updates['pending'];
+      }
+    }
+    return array();
+  }
+
+  public function postInstallTasks() {
+    return array(
+      l(t('Enable newly added modules'), 'admin/modules'),
+      l(t('Administration pages'), 'admin'),
+    );
+  }
+
+  public function postUpdateTasks() {
+    // We don't want to check for DB updates here, we do that once for all
+    // updated modules on the landing page.
+  }
+
+}
+
+/**
+ * Class for updating themes using FileTransfer classes via authorize.php.
+ */
+class ThemeUpdater extends Updater implements DrupalUpdaterInterface {
+
+  /**
+   * Return the directory where a theme should be installed.
+   *
+   * If the theme is already installed, drupal_get_path() will return
+   * a valid path and we should install it there (although we need to use an
+   * absolute path, so we prepend DRUPAL_ROOT). If we're installing a new
+   * theme, we always want it to go into sites/all/themes, since that's
+   * where all the documentation recommends users install their themes, and
+   * there's no way that can conflict on a multi-site installation, since
+   * the Update manager won't let you install a new theme if it's already
+   * found on your system, and if there was a copy in sites/all, we'd see it.
+   */
+  public function getInstallDirectory() {
+    if ($relative_path = drupal_get_path('theme', $this->name)) {
+      $relative_path = dirname($relative_path);
+    }
+    else {
+      $relative_path = 'sites/all/themes';
+    }
+    return DRUPAL_ROOT . '/' . $relative_path;
+  }
+
+  public function isInstalled() {
+    return (bool) drupal_get_path('theme', $this->name);
+  }
+
+  static function canUpdateDirectory($directory) {
+    // This is a lousy test, but don't know how else to confirm it is a theme.
+    if (file_scan_directory($directory, '/.*\.module$/')) {
+      return FALSE;
+    }
+    return TRUE;
+  }
+
+  public static function canUpdate($project_name) {
+    return (bool) drupal_get_path('theme', $project_name);
+  }
+
+  public function postInstall() {
+    // Update the system table.
+    clearstatcache();
+    system_rebuild_theme_data();
+
+  }
+
+  public function postInstallTasks() {
+    return array(
+      l(t('Enable newly added themes'), 'admin/appearance'),
+      l(t('Administration pages'), 'admin'),
+    );
+  }
+}
diff --git a/core/modules/update/update.authorize.inc b/core/modules/update/update.authorize.inc
index 48dfd353f2198ea6a886beca17451cd3246ec402..35dde0eb4fc3d35a95208b053e97ae8007c67b0b 100644
--- a/core/modules/update/update.authorize.inc
+++ b/core/modules/update/update.authorize.inc
@@ -9,8 +9,6 @@
  * the rest of the update module code.
  */
 
-use Drupal\Core\Updater\UpdaterException;
-
 /**
  * Callback invoked by authorize.php to update existing projects.
  *
@@ -21,8 +19,7 @@
  *   A nested array of projects to install into the live webroot, keyed by
  *   project name. Each subarray contains the following keys:
  *   - 'project': The canonical project short name.
- *   - 'updater_name': The name of the Drupal\Core\Updater\Updater class to use
- *     for this project.
+ *   - 'updater_name': The name of the Updater class to use for this project.
  *   - 'local_url': The locally installed location of new code to update with.
  */
 function update_authorize_run_update($filetransfer, $projects) {
@@ -61,8 +58,7 @@ function update_authorize_run_update($filetransfer, $projects) {
  * @param string $project
  *   The canonical project short name (e.g. {system}.name).
  * @param string $updater_name
- *   The name of the Drupal\Core\Updater\Updater class to use for installing
- *   this project.
+ *   The name of the Updater class to use for installing this project.
  * @param string $local_url
  *   The URL to the locally installed temp directory where the project has
  *   already been downloaded and extracted into.
@@ -99,8 +95,7 @@ function update_authorize_run_install($filetransfer, $project, $updater_name, $l
  * @param string $project
  *   The canonical short name of the project being installed.
  * @param string $updater_name
- *   The name of the Drupal\Core\Updater\Updater class to use for installing
- *   this project.
+ *   The name of the Updater class to use for installing this project.
  * @param string $local_url
  *   The URL to the locally installed temp directory where the project has
  *   already been downloaded and extracted into.
diff --git a/core/modules/update/update.manager.inc b/core/modules/update/update.manager.inc
index 82b48f3a68baae9860166f2a9cc43df0102eaabc..f56dd0b1585dca70b80e9ff044a7989e48ff6906 100644
--- a/core/modules/update/update.manager.inc
+++ b/core/modules/update/update.manager.inc
@@ -35,8 +35,6 @@
  * into the live web root.
  */
 
-use Drupal\Core\Updater\Updater;
-
 /**
  * @defgroup update_manager_update Update manager: update
  * @{
@@ -395,10 +393,9 @@ function update_manager_update_ready_form($form, &$form_state) {
  *
  * If the site administrator requested that the site is put offline during the
  * update, do so now. Otherwise, pull information about all the required
- * updates out of the SESSION, figure out what Drupal\Core\Updater\Updater class
- * is needed for each one, generate an array of update operations to perform,
- * and hand it all off to system_authorized_init(), then redirect to
- * authorize.php.
+ * updates out of the SESSION, figure out what Updater class is needed for
+ * each one, generate an array of update operations to perform, and hand it
+ * all off to system_authorized_init(), then redirect to authorize.php.
  *
  * @see update_authorize_run_update()
  * @see system_authorized_init()
@@ -603,10 +600,10 @@ function update_manager_install_form_validate($form, &$form_state) {
  * Either downloads the file specified in the URL to a temporary cache, or
  * uploads the file attached to the form, then attempts to extract the archive
  * into a temporary location and verify it. Instantiate the appropriate
- * Drupal\Core\Updater\Updater class for this project and make sure it is not
- * already installed in the live webroot. If everything is successful, setup an
- * operation to run via authorize.php which will copy the extracted files from
- * the temporary location into the live site.
+ * Updater class for this project and make sure it is not already installed in
+ * the live webroot. If everything is successful, setup an operation to run
+ * via authorize.php which will copy the extracted files from the temporary
+ * location into the live site.
  *
  * @see update_authorize_run_install()
  * @see system_authorized_init()