WINDOWS UPDATES ISSUE

Updates are not installed successfully from Windows Update, from Microsoft Update, or by using Automatic Updates after you repair a Windows XP installation

RESOLUTION :-

Method 1: Register the Wups2.dll file in Windows

To register the Wups2.dll file in Windows, follow these steps:
1. Stop the Automatic Updates service. To do this, follow these steps:
a. Click Start, click Run, type cmd, and then click OK.
b. At the command prompt, type the following command, and then press ENTER:
net stop wuauserv
2.Register the Wups2.dll file. To do this, follow these steps:
a. At the command prompt, type the following command, and then press ENTER:
regsvr32 %windir%\system32\wups2.dllNote For a computer that is running Windows XP Professional x64 Edition, type the following command, and then press ENTER:
regsvr32 %windir%\syswow64\wups2.dll
b. Click OK on each verification message that you receive.
3. Start the Automatic Updates service. To do this, type the following command at the command prompt, and then press ENTER:
net start wuauserv
4. Exit the command prompt. To do this type exit, and then press ENTER.

Method 2: Download and install the Windows Update Agent
To resolve this problem, follow these steps:
1.Download the appropriate version of the Windows Update Agent to a known location. To do this, visit one of the following Web sites.
AgentWindows, x86-based systems
http://download.windowsupdate.com/WindowsUpdate/redist/standalone/7.0.6000.381/WindowsUpdateAgent30-x86.exe
Windows, x64-based systems
http://download.windowsupdate.com/WindowsUpdate/redist/standalone/7.0.6000.381/WindowsUpdateAgent30-x64.exe
Windows, Itanium-based systems
http://download.windowsupdate.com/WindowsUpdate/redist/standalone/7.0.6000.381/WindowsUpdateAgent30-ia64.exe
2.Click Start, click Run, click Browse, locate the file that you saved in step 1, and then click Open.
3.Add the /wuforce switch to the end of the run command, and then click OK. For example, the run command may appear as the following:
C:\WindowsUpdateAgent30-x86.exe /wuforce
4.Click Run.
5.Follow the steps to complete the wizard.

For more info Vist:- http://support.microsoft.com/kb/943144

To Do Windows Update Manually Vist:-http://www.update.microsoft.com/

Thanks to Kenny Joshi for sharing the info