After you upgrade to Adobe Reader 9, the AIR explorer window opens when Windows starts up.


You are using Windows XP or Vista, and you just upgraded from Adobe Reader 7.x or 8.x, or Acrobat Professional 7.x, or 8.x.


Solution 1: Disable items from your startup group using the System Configuration Utility.

  1. Choose Start > Run (or for Vista you can use the Start Search box).
  2. Type msconfig and press Enter.
  3. In the System Configuration Utility, click the Startup tab.
  4. Uncheck the "AdobeUpdateManager".

    Note: In the "command" column, it will display "....\program files\adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe" AcRdB7_0_5 -reboot 1

Solution 2: Add Quotes to unquoted path(s) in the Registry.

  1. Choose Start > Run (or for Vista you can use the Start Search box).
  2. Type regedit and press Enter.
  3. Navigate to the following registry key locations, and add quotes to the file path:


    Original key -

    C:\Program Files\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe AcRdB7_0_5 -reboot 1

    Will become -

    "C:\Program Files\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe" AcRdB7_0_5 -reboot 1

Known Keys that may cause this issue:

Key/Value Acrobat/Reader Version

Acrobat Reader 7.x

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\Adobe Acrobat Synchronizer Acrobat 8.1 (After using Shared Review or adding RSS Subscriptions)

Solution 3: Uninstall the AIR Application.

  1. Choose Start > Settings > Control Panels > Add/Remove Programs.
  2. Click
  3. Click Remove/Uninstall and follow the on-screen steps to complete the uninstallation.

Solution 4: Delete the AIR application folder.

  1. Navigate to C:\Program Files\Adobe\.
  2. Locate the folder.
  3. Delete the folder.

    Note: This step will not impact your Reader install. If later, you'd like to reinstall the AIR application, then you can download it from to regain that functionality with

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License  Twitter™ and Facebook posts are not covered under the terms of Creative Commons.

Legal Notices   |   Online Privacy Policy