I found an useful utility in case of problems running Microsoft Windows Updates. The Fix WU V1.0 is a simple utility to re-register a total of 114 .dll, ocx and .ax files which are required for the proper functioning of Windows Updates.
If Windows Update doesn't run, just try to run this tool, in few seconds repairs vital files for Windows Update. Fix WU is a freeware portable tool to add to your USB Swiss Army Knife, tested on Windows 7 & Vista, 32bit and 64bit versions.
Link : Fix WU Utility v 1.0