create a new topic here in the Windows 7 forums and upload the following files: the complete folder C:\Windows\logs\CBS, C:\Windows\inf\setupapi.dev.log, C:\Windows\WindowsUpdate.log and the C:\Windows\winsxs\poqexec.log /compress them to 1 zip) set the starttype to manual (open the services MMC snapin (services.msc) find the service, doublclick on it and set the startype to manual). Now Windows no longer starts it by default only if a programs/service needs it. the hotfix applies to Win7 RTM he already uses Win7 Sp1 which includes the fix.