Windows XP SP3 - update.exe extended error code 0xf00d

Every once in a while an old Windows XP machine will make its way back onto our network – most of the time it’s an old laptop that has been sitting in someone’s desk or in some storage room. Machines are checked out for missing patches or Anti-Virus dat updates prior to the machine being added back onto our domain however once in a while a machine will be missed. For this reason we are still scanning for pre Windows XP SP3 machines and if one is detected SP3 is pushed to it so that the machine can catch up on patches. (We are looking at quarantine solution for rouge machines but that’s another story) The other day a Windows XP SP2 laptop was detected but the SP3 upgrade kept failing. The only sign of a problem in Event Viewer was an entry stating that the update had been cancelled and when I ran the update interactively, same thing.  When I checked the install log (C:\Windows\svcpack.log) it had the following entry: update.exe extended error code 0xf00d 

After some searching I found that if you browse to C:\Windows\System32 and rename spupdsvc.exe to something like spupdsvc.old and then reapply the update, spupdsvc.exe will get recreated and Service Pack 3 will complete successfully.