Yeah, maybe you deleted something that you needed by mistake?
It doesn't sound like a back to square one thing, just a reinstall-fix windows. Probably not a full Remastering.
Depends how old the Pooter is and whether you can remember whether you've fiddled with the files?
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.