WMIPRVSE is being tagged as Backdoor virus... post windows update April 17-18 - subsequent Zone Alarm behavior blocks re-running KB956572 and Windows Update in General.
Believe either False Positive - or Microsoft packaged a Windows Update with the Backdoor... Backdoor.Win32.Agent.afqs
Is it Microsoft, Is it Zone Alarm - or - is it real?
Trying to repost the update fails for KB... after quarantine - systems scan clean... all upon which i run Zone Alarm...

Operating System:Windows XP Pro
Software Version:8.0
Product Name:ZoneAlarm Internet Security Suite