Error 646 when installing updates in windows Vista

Hi, I need someone to help me on this problem while trying to install on my Vista windows updates, I am constantly the error code 646... I tried to install them manually as well, however without much luck... can someone guide me, please?

Thank you
Ajith

Option: File of Windows Update agent wups2.dll is incorrectly registered and the registry associated with the Wups2.dll file files are missing.

Method 1: Save the Windows Update files

1. Click Start and type notepad in the box start the search.
2. click on Notepad in the list programs.
3. copy the following commands, and then paste them into the opened Notepad window:
REGSVR32 WUPS2. DLL/S
REGSVR32 STINKS. 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
4. in Notepad, on the file menu, click Save as.
5. in the file type list, click all files.
6. in the file name box, type register.bat.
7. save the Register.bat file to your desktop.
8 right-click the Register.bat file, and then click Run as administrator. If you are prompted for an administrator password or a confirmation, type the password or click on continue.
9. try to reinstall updates.

http://support.Microsoft.com/kb/958053
See: method 1: save the Windows Update files

http://support.Microsoft.com/kb/326253
Method 5: Registry Windows Update engine files

http://support.Microsoft.com/kb/971058
How to reset the Windows Update components?

Method 2: Download and install Windows Update agent

Windows Update Agent

How to get the latest version of the Windows Update Agent to help manage updates on a computer
http://support.Microsoft.com/kb/949104

Information for network administrators about how to obtain the latest Windows Update Agent
http://support.Microsoft.com/kb/946928

Click Start, click run, click Browse, navigate to the file you saved and click Open.

Add the switch /wuforce at the end of the command run and then click OK. For example, the command run might look like this: "C:\WindowsUpdateAgent30-x86.exe" /wuforce

Click run.

Follow the steps to complete the wizard.

Important

To reinstall Windows Update Agent - download the relevant file from one of the links provided above and save it to a drive where Vista is not loaded because the file cannot be launched directly from the root directory of the system.

Click Start, run, type: "D:\WindowsUpdateAgent30-x86.exe /wuforce" (without the quotes) and press ENTER to install the Windows Update engine.

Note: There is a space between "D:\WindowsUpdateAgent30-x86.exe" and "/ wuforce.

D: is the drive where Windows is not installed (IE a flash drive or a 2nd hard drive etc.)

TaurArian [MVP] 2005-2010 - Update Services

Tags: Windows

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