GetSystemD not found in kernel32.dll

Windows Update (Vista Ultimate and 2007 Office) of 4/15/2007

Upon reboot, consistent error on all system and office apps occurs which prevents execution.

Error=
The procedure entry point GetSystemD" could not be located in the dynamic
link library KERNEL32.dll.

When I try to uninstall the updates, I get message that no updates are
installed on my PC - although the Windows Update website shows a long list of
updates for my PC.

When I try to restore to a previous version of Vista, I get the same error.

Bottom line - I am furious.

Thanks to this Microsoft caused disaster I was unable to give my presentation to a new client today.. I just want to format my hard drive and revert back to old reliable XP

Can someone please help me ?