回复：KB942831 这个补不上阿
试试这个吧
net stop wuauserv
cd %WINDIR%
if exist SoftwareDistribution_bak rd SoftwareDistribution_bak /S /Q
ren SoftwareDistribution SoftwareDistribution_bak
regsvr32 /s wuapi.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wuaueng1.dll
regsvr32 /s wucltui.dll
regsvr32 /s wups.dll
regsvr32 /s wups2.dll
regsvr32 /s wuweb.dll
regsvr32 /s msxml.dll
regsvr32 /s msxml2.dll
regsvr32 /s msxml3.dll
net start wuauserv
wuauclt /resetauthorization /detectnow
把上变粘贴到文本文档，后缀txt改成*.bat,运行后就会好
