Saturday, November 27, 2010

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Fix Error 0x80070646 Or 646 Or 1606 While Installing Office Updates

When you try to install updates for Microsoft Office applications through Windows Update or through Microsoft Update, you may receive one of the following error codes. 
Error 1: 0x80070646
Error 2: 646 
Error 3: If Windows Installer logging is enabled, the following line should be noted as a symptom: Error 1606. Could not access network location %APPDATA%\ 
Summary:
We are aware of a potential issue you may encounter with recent Office Security updates. When installing these updates, the Windows Update control panel returns the error 646 or 0x80070646.

Technical Details:
The error 0x80070646 or 646 is an MSI installer error that will only occur when the updates are installed via the Windows Update control Panel. Previous workaround to resolve the immediate problem requires the installation of the update from a standalone package from the Microsoft Download Center. We do not recommend this workaround.

Cause: The problem is potentially a result of an inconsistent/incorrect environmental variable (%AppData%) as shown below:
This problem occurs when Windows Installer encounters an error. Error code 0x80070646 and error code 646 are generated by Windows Installer. These generic errors indicate that Windows Installer encountered a problem. When you encounter the errors that are described in the "Symptoms" section, the problem may be caused by an incorrect value in the registry.

Solution:
For Windows 7 and Windows Vista users
  • 1. Click Start, and then in the Start Search box, type regedit.
  • 2. In the Programs list, right-click Regedit.exe, and then click Run as administrator. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
  • 3. Locate and then click the following registry subkey.
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
  • 4. In the details pane of Registry Editor, locate AppData. The value of this key should be %USERPROFILE%\AppData\Roaming.
  • 5. If the value is not set to %USERPROFILE%\AppData\Roaming, right-click AppData in the details pane, and then click Modify.
  • 6. Enter %USERPROFILE%\AppData\Roaming into the Value data box, and then click OK.
  • 7. Close Registry Editor.
  • 8. Try to install the update again. If the problem persists, repeat these steps but use the following registry subkeys instead of the subkey that is specified in step 3:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders 
For Windows XP users
  • 1. Click Start, and then click Run.
  • 2. In the Open box, type regedit, and then click OK.
  • 3. In the Programs list, click Regedit.exe. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
  • 4. Locate and then click the following registry subkey:
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
  • 5. In the details pane of Registry Editor, locate AppData. The value of this key should be %USERPROFILE%\Application Data.
  • 6. If the value is not set to %USERPROFILE%\Application Data, right-click AppData in details pane, and then click Modify
  • 7. In the Value data box, enter %USERPROFILE%\Application Data, and then click OK.
  • 8. Close Registry Editor.
  • 9. Try to install the update again. If the problem persists, repeat these steps but use the following registry subkeys instead of the subkey that is specified in step 4 above:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders

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Haja Peer Mohamed H, Software Engineer by profession, Author, Founder and CEO of "bench3" you can connect with me on Twitter , Facebook and also onGoogle+

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