To resolve this problem in Microsoft Windows 2000, Windows XP, and Windows Server 2003
Important If you have downloaded but not installed updates from Windows Update or from Microsoft Update, you must download those updates again after you complete these steps.
Click Start, click Run, type Notepad, and then click OK.
Copy the following text, and then paste the text into Notepad.
net stop wuauserv
cd %systemroot%\SoftwareDistribution
ren Download Download.old
net start wuauserv
net stop bits
net start bits
net stop cryptsvc
cd %systemroot%\system32
ren catroot2 catroot2old
net start cryptsvc
Click File, click Save As, and then type Repair.bat.
In the Save as type box, click All Files.
In the Save in box, click Desktop, and then click Save.
On the File menu, click Exit.
Double-click the Repair.bat file that you saved in step 5.
Try to install the updates again. If you can install the updates, delete the Repair.bat file. To do this, right-click Repair.bat, click Delete, and then click Yes.
To resolve this problem in Windows Vista and Windows Server 2008
Important If you have downloaded but not installed updates from Windows Update or from Microsoft Update, you must download those updates again after you complete these steps.
Click Start
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, type Notepad in the Start Search box, and then click Notepad in the Programs list.
Copy the following text, and then paste the text in Notepad.
net stop wuauserv
cd %systemroot%\SoftwareDistribution
ren Download Download.old
net start wuauserv
net stop bits
net start bits
Click File, click Save As, and then type Repair.bat.
In the Save as type box, click All Files (*.*).
In the Save in box, click Desktop, and then click Save.
On the File menu, click Exit.
Right-click the Repair.bat file that you saved in step 5, and then click Run as administrator.
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If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
Try to install the updates again. If you can install the updates, delete the Repair.bat file. To delete the Repair.bat file, right-click Repair.bat, click Delete, and then click Yes.