Sasha

Actually, after looking at everything the programme does, it unregisters DLLs, then changes the registry, and then reregisters the DLLs. Were you to have a hardware failure while the DLLs are unregistered, you'd be lucky if the WINDOWS even boots up, because some of those DLLs are essential to WINDOWS. So yeah, the programme didn't actually mess up your hard drive, it just made it very vulnerable while it was fixing it, and you just so happened to have a crash in the meanwhile.