1) Delete the computer from the WSUS server (not really necessary, but not a bad idea). 2) stop the AU service (services.msc) 3) Delete the " C:\Windows\SoftwareDistribution" folder 4) Delete the "C:\Windows\WindowsUpdate.log" file 5) Open a command prompt and execute the following batch file: @echo on net stop wuauserv REG DELETE "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v AccountDomainSid /f REG DELETE "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v PingID /f REG DELETE "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /v SusClientId /f REG DELETE "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v LastWaitTimeout /f REG DELETE "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v DetectionStartTime /f Reg Delete "HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v NextDetectionTime /f regsvr32 /s wuapi.dll regsvr32 /s wups.dll regsvr32 /s wuaueng.dll regsvr32 /s wucltui.dll regsvr32 /s msxml3.dll 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 net start wuauserv wuauclt /resetauthorization /detectnow exit Most of the time just step 2, 3, restart service from 2, then wuauclt.exe /detectnow from a command prompt and all is well, the whole process pretty much guarantees it though From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Snyder Sent: Tuesday, 23 February 2010 3:29 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] OT:WSUS 3 issue slowly poking around and learning wsus on the fly - I have one server that seems to be checking in okay with the WSUS server on both the server and client logs, but the client keeps seeing 0 updates needed and the WSUS server shows 20 updates needed for that client. from the registry on the client it appears the last successful install was last october. ideas? troubleshooting tips?