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Windows error 646 cannot update windows norton live the same windows vista

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The Error Code 646 can occur if the Windows Update Agent Wups2.dll file is registered incorrectly in the Operating System registry. So when you try to install a Windows Update, because the registry files that correspond to the Wups2.dll file are missing, the update installation fails.

Follow these steps to properly register the Windows Update files and resolve the issue:

1. Click the Start button, click All Programs, click Accessories, and then click Notepad.

2. In the Untitled - Notepad window, either copy and paste or manually type the following commands into the text field:

REGSVR32 WUPS2.DLL /S
REGSVR32 WUPS.DLL /S
REGSVR32 WUAUENG.DLL /S
REGSVR32 WUAPI.DLL /S
REGSVR32 WUCLTUX.DLL /S
REGSVR32 WUWEBV.DLL /S
REGSVR32 JSCRIPT.DLL /S
REGSVR32 MSXML3.DLL /S


3. On the menu bar, click File.

4. In the File menu, click Save As.

5. In the Save As window, in the File name field, type Register.bat.

6. In the Save as type field, click the down arrow and click to select All Files (*.*).

7. Click the Browse Folders button.

8. Browse to the Desktop folder, and then click the Save button.

9. In the Register.bat - Notepad window, click the X in the upper-right corner to close the window.

10. On the Desktop, right-click the Register.bat file, and then click "Run As Administrator".

NOTE: If prompted for an Administrator password or a User Account Control prompt is displayed, type the appropriate password, click Continue or click Yes.

11. Once the Register.bat file has run, click the Start button, click All Programs, then click Windows Update and try to install updates again.

12. NOTE: If the updates still fail to install properly, it may be necessary update the version of the Windows Update Agent software installed on the Computer.

Follow the steps in Microsoft KB Article ID 949104 to download and install the latest version of the Windows Update Agent software.


Good Luck!!!!!!!!!

Posted on Nov 18, 2009

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How to fix error code 646 microsoft windows vista home premium software


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