Method 2
You may also re-register Windows Update DLLs.
To do this, follow these steps:
1.Click on Start, Run, and type CMD and click ok
2.In the black command window type the following command and press Enter
REGSVR32 WUAPI.DLL
Wait until you receive the "DllRegisterServer in WUAPI.DLL succeeded" message and click OK.
* Repeat the same step for each of the following commands:
REGSVR32 WUAUENG.DLL
REGSVR32 WUAUENG1.DLL
REGSVR32 ATL.DLL
REGSVR32 WUCLTUI.DLL
REGSVR32 WUPS.DLL
REGSVR32 WUPS2.DLL
REGSVR32 WUWEB.DLL