Help... Stuck on Windows activation screen...

Hi,

I was fine with Parallels 3.0 but decided to install 5.0, all went nice and smoothly until the conversion/upgrade of the my virtual XP disk. Started off fine but then was taking ages searching or hardware changes so I moved to manual (ctrl+option+alt+r) and found it was stuck in Windows genuine activation loop, that when I confirm activation says "script running capabilities have been inactivated" so it cannot activate...
Stuck...
Any help would be appreciated.

Thanks

G Silva