Delete files from the Windows Update folder
On the Windows desktop, double-click My Computer, double-click drive C, double-click the Program Files folder, and then double-click the WindowsUpdate folder.
Click the V4 folder, click Edit, click Invert Selection, and then press DELETE.
Note If you cannot find the V4 folder, click Edit, click Select All and then press DELETE. Skip steps 3 and 4.
Double-click the V4 folder.
Click the Iuhist.xml file, click Edit, click Invert Selection, and then press DELETE.
Remove the Windows Update ActiveX controls
Click Start, then click Search, and then click For Files or Folders. Search for files named Iuctl.dll and Iuengine.dll.
If these files are found in the C:\Windows\System32\Dllcache folder, delete them.
If these files are found in any other folder, other than C:\Windows\System32, delete them.
After you have deleted all other copies of these files, delete them from the C:\Windows\System32 folder.
Visit the Windows Update Web site to install new copies of the ActiveX controls.