Yesterday I installed some updates at Microsoft Update. When it completed the setup, it had me restart the computer. My computer wont boot now, it hangs on the Windows Me screen. If i press 'Esc' it says,

"Please wait while Setup Updates your configuration files.
This may take a few minutes...

Windows could not upgrade the file %1 from %2
%1: %2"

I have absolutely no clue how to fix this. Any and all help will be greatly appreciated!