Vista's Windows Update 8000FFFF error resolution

In Windows Vista, there could be an error thrown up while trying to run Windows Update.

To resolve Windows Update error 8000FFFF, try the following steps:
1. Launch REGEDIT
2. Go into HKLM\COMPONENTS, and check if these three values exist under the COMPONENTS key:
PendingXmldentifier
NextQueueEntryIndex
AdvancedInstallersNeedResolving
3) Providing they do exist, back up the Components key, then delete the three above values.
4) Restart the computer, and Windows Update should now be working fine.