regsvr32 wuweb.dll
regsvr32 wuapi.dll
regsvr32 wucltui.dll
regsvr32 wuaueng.dll
regsvr32 wups.dll
regsvr32 wups2.dll
net stop wuauserv
net start wuauserv
net stop bits
net start bits
net stop w32time
net start w32time
net stop msiserver
net start msiserver
請重新執行Windows Update即可