点击开始，运行，输入cmd并回车。

然后输入以下命令：

net stop CryptSvc

ren %windir%\system32\catroot2 catroot2.old 

net start CryptSvc

net stop wuauserv

regsvr32 wuapi.dll /s

regsvr32 wups.dll /s

regsvr32 wuaueng.dll /s

regsvr32 wucltui.dll /s

regsvr32 wuweb.dll /s

regsvr32 msxml.dll /s

regsvr32 msxml2.dll /s

regsvr32 msxml3.dll /s

regsvr32 urlmon.dll /s

net start wuauserv

regsvr32 softpub.dll /s

regsvr32 initpki.dll /s

regsvr32 mssip32.dll /s

regsvr32 wintrust.dll /s

regsvr32 dssenh.dll /s

regsvr32 rsaenh.dll /s

regsvr32 gpkcsp.dll /s

regsvr32 sccbase.dll /s

regsvr32 slbcsp.dll /s

regsvr32 cryptdlg.dll /s

regsvr32 jscript.dll /s

然后再次尝试更新