Tente utilizando a BAT que uso aqui.
AtuWSUS.bat
@echo off
cd\
net stop WUAUSERV
SC CONFIG wuauserv start= auto
net start WUAUSERV
wscript "%LOGONSERVER%\netlogon\delValReg.vbs" /y
NET START WUAUSERV
SC sdshow wuauserv D:(A;;CCLCSWRPLORC;;;AU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;SY)
SC sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
wuauclt.exe /resetauthorization /detectnow
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
delValReg.vbs
Set WshShell = Wscript.CreateObject("Wscript.Shell")
On Error Resume Next
WshShell.RegDelete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\windowsUpdate\Susclientid"
On Error Goto 0
