OK,
NTDOC, thanks man. That was the quickest response ever...
The "wuauclt /resetauthorization /detectnow" is actually a utility command. So it should be in the path of all users.... Would I be able to execute it if I make the following additions to your code? (See RUN part I've added) also, If I run this from my computer, logged in as my account (domain administrator) will this execute using my credentials on the remote pcs?

For Each $sComputer In $sComputers
$sComputer=IIf(Not $sComputer,'','\\'+Join(Split($sComputer,'\'),'',3)+'\')
If $sComputer
$Nul = DelValue($sComputer+$Key,'AccountDomainSid')
$Nul = DelValue($sComputer+$Key,'PingID')
$Nul = DelValue($sComputer+$Key,'SusClientId')
$Nul = fnWMIService('wuauserv','stop',$sComputer)
$Nul = fnWMIService('wuauserv','start',$sComputer)
RUN "wuauclt /resetauthorization /detectnow"
EndIf

Mart,

Thanks for the information about kixcrypt. I didn't realize that it decrypts to a regular kix file and stores it locally on the computer.

Wes