Client kontaktiert WSUS nicht

#Stop Windows Update , BITS and cryptographic services:
net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc
taskkill /im wuauclt.exe /f


#Delete service files qmgr*.dat from the folder %ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\:

Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"  

#Rename system folders, in which configuration files and update cache are stored (if necessary, they can be used as backups). After the WU services are restarted the folders will be automatically created again:

Ren %systemroot%\SoftwareDistribution SoftwareDistribution.bak
Ren %systemroot%\system32\catroot2 catroot2.bak
Delete the old windowsupdate.log file :
del /f /s /q %windir%\windowsupdate.log


#Reset the permissions for BITS and Windows Update services (if service permissions have been changed):

"sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)"  
"sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)"  
"sc.exe sdset cryptsvc D:(A;;CCLCSWLOCRRC;;;AU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCDCLCSWRPWPDTLCRSDRCWDWO;;;SO)(A;;CCLCSWRPWPDTLOCRRC;;;SY)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;WD)"  
"sc.exe sdset trustedinstaller D:(A;;CCLCSWLOCRRC;;;AU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCDCLCSWRPWPDTLCRSDRCWDWO;;;SO)(A;;CCLCSWRPWPDTLOCRRC;;;SY)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;WD)"  

#Re-register the files of system dynamic libraries (dll) related to BITS and Windows Update:

cd /d %windir%\system32
regsvr32.exe /U /s vbscript.dll
regsvr32.exe /U /s mshtml.dll
regsvr32.exe /U /s msjava.dll
regsvr32.exe /U /s msxml.dll
regsvr32.exe /U /s actxprxy.dll
regsvr32.exe /U /s shdocvw.dll
regsvr32.exe /U /s Mssip32.dll
regsvr32.exe /U /s wintrust.dll
regsvr32.exe /U /s initpki.dll
regsvr32.exe /U /s dssenh.dll
regsvr32.exe /U /s rsaenh.dll
regsvr32.exe /U /s gpkcsp.dll
regsvr32.exe /U /s sccbase.dll
regsvr32.exe /U /s slbcsp.dll
regsvr32.exe /U /s cryptdlg.dll
regsvr32.exe /U /s Urlmon.dll
regsvr32.exe /U /s Oleaut32.dll
regsvr32.exe /U /s msxml2.dll
regsvr32.exe /U /s Browseui.dll
regsvr32.exe /U /s shell32.dll
regsvr32.exe /U /s atl.dll
regsvr32.exe /U /s jscript.dll
regsvr32.exe /U /s msxml3.dll
regsvr32.exe /U /s softpub.dll
regsvr32.exe /U /s wuapi.dll
regsvr32.exe /U /s wuaueng.dll
regsvr32.exe /U /s wuaueng1.dll
regsvr32.exe /U /s wucltui.dll
regsvr32.exe /U /s wups.dll
regsvr32.exe /U /s wups2.dll
regsvr32.exe /U /s wuweb.dll
regsvr32.exe /U /s scrrun.dll
regsvr32.exe /U /s msxml6.dll
regsvr32.exe /U /s ole32.dll
regsvr32.exe /U /s qmgr.dll
regsvr32.exe /U /s qmgrprxy.dll
regsvr32.exe /U /s wucltux.dll
regsvr32.exe /U /s muweb.dll
regsvr32.exe /U /s wuwebv.dll
regsvr32.exe /s vbscript.dll
regsvr32.exe /s mshtml.dll
regsvr32.exe /s msjava.dll
regsvr32.exe /s msxml.dll
regsvr32.exe /s actxprxy.dll
regsvr32.exe /s shdocvw.dll
regsvr32.exe /s Mssip32.dll
regsvr32.exe /s wintrust.dll
regsvr32.exe /s initpki.dll
regsvr32.exe /s dssenh.dll
regsvr32.exe /s rsaenh.dll
regsvr32.exe /s gpkcsp.dll
regsvr32.exe /s sccbase.dll
regsvr32.exe /s slbcsp.dll
regsvr32.exe /s cryptdlg.dll
regsvr32.exe /s Urlmon.dll
regsvr32.exe /s Oleaut32.dll
regsvr32.exe /s msxml2.dll
regsvr32.exe /s Browseui.dll
regsvr32.exe /s shell32.dll
regsvr32.exe /s Mssip32.dll
regsvr32.exe /s atl.dll
regsvr32.exe /s jscript.dll
regsvr32.exe /s msxml3.dll
regsvr32.exe /s softpub.dll
regsvr32.exe /s wuapi.dll
regsvr32.exe /s wuaueng.dll
regsvr32.exe /s wuaueng1.dll
regsvr32.exe /s wucltui.dll
regsvr32.exe /s wups.dll
regsvr32.exe /s wups2.dll
regsvr32.exe /s wuweb.dll
regsvr32.exe /s scrrun.dll
regsvr32.exe /s msxml6.dll
regsvr32.exe /s ole32.dll
regsvr32.exe /s qmgr.dll
regsvr32.exe /s qmgrprxy.dll
regsvr32.exe /s wucltux.dll
regsvr32.exe /s muweb.dll
regsvr32.exe /s wuwebv.dll
Reset Winsock settings:
netsh winsock reset
Reset system proxy settings:
netsh winhttp reset proxy

#Optional. When using a local WSUS server, you can also reset the current binding of a client to the WSUS server by deleting the following parameters in the registry key HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate:

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\Policies\Microsoft\Windows\WindowsUpdate" /v TargetGroup /f  
REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" /v WUServer /f  
REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" /v WUStatusServer /f  


#Start the previously stopped services:

sc.exe config wuauserv start= auto
sc.exe config bits start= delayed-auto
sc.exe config cryptsvc start= auto
sc.exe config TrustedInstaller start= demand
sc.exe config DcomLaunch start= auto
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc