You may receive error message 646 when micosoft office updates, windows update failing, install Windows 7 ..., this page contains some useful information to repair your computer error code 646, if you fixed this error from this help article, you can email us (windowsxpregistrycleaner@gmail.com ) give your feedback, and we hope you can share this page to your friends if they need like you, thanks.

 

Windows Vista - update error code 646

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• When you try to install the Windows updates on your Window Vista system, you may get the error below:
  
  "error 646 or 0x80070646"
   
• How to fix?
  
  To resolve this problem, verify the value of the AppData key in the registry. Follow the steps in the procedure that applies to your Windows Vista:
  
  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

   

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Microsoft help links for error 646

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• Remote Access Service (RAS) Error Code List - 646 The account is not permitted to log on at this time of day.
   
• Update error code 646

 

• If you still haven't fixed the windows vista code 646 problem:
  
  1. Please try the tool windows registry optimizer, it safely cleans PC errors & invalid entries cause slow speed, blue screen, deadlock errors and crashing, and repair registry problems to speedup your computer performances. It is easy to use. And you can scan your PC errors for free first!
  
  2. Some pc error is related to driver problems, Driver Update software is designed to quickly locate the most current drivers specific to your computer system, you can run a free scan for your pc driver update first.
   

That is we find the informations to fix code 646 problems in windows vista, hope our page is helpful to you, if you still haven't fixed this errors, please contact microsoft support for further help.

 

 

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Error 646 Home > Categories > Windows Vista Error - Update: February 28, 2010

>>> Vista Error Code 646 Fix