- Click Start, click Run, type REGSVR32 WUAPI.DLL, and then press ENTER.
- When you receive the "DllRegisterServer in WUAPI.DLL succeeded" message, click OK.
- Type the following commands in the Open box, one after the other, and then press ENTER after each command:
REGSVR32 WUAUENG.DLL
REGSVR32 WUAUENG1.DLL
REGSVR32 ATL.DLL
REGSVR32 WUCLTUI.DLL
REGSVR32 WUPS.DLL
REGSVR32 WUPS2.DLL
REGSVR32 WUWEB.DLL