XP-Home ran Spybot, now can't run programs anymore

Tech-Archive recommends: Speed Up your PC by fixing your registry

From: Sinterklaas (Sinterklaas_at_discussions.microsoft.com)
Date: 12/26/04 

Date: Sun, 26 Dec 2004 09:49:03 -0800

We installed Spybot, ran it, it removed 66 treats, and now we can't even run
windows explorer anymore, we can't either roll back the former configuration.
Do we need to install Windows completely at new?