WSUS clients not reporting after being deleted

Hi all, i have had several hundred machines not report into the WSUS console for a number of months so i have ran the database cleanup and it removed the machines. Unfortunately i cant seem to get them back. I have tried running the following script but they still dont appear. Any ideas?

thanks

%Windir%\system32\gpupdate

%Windir%\system32\net.exe stop bits
%Windir%\system32\net.exe stop wuauserv
%Windir%\system32\net.exe stop cryptsvc
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
del %WINDIR%\WindowsUpdate.log /S /Q
rd /s /q %windir%\softwareDistribution
%Windir%\system32\net.exe start cryptsvc
%Windir%\system32\net.exe start bits
%Windir%\system32\net.exe start wuauserv


sc sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)


sc sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)

wuauclt /resetauthorization /detectnow
wuauclt /reportnow