I've managed to pick up a virus somewhere along the line - spybot W32 but my Norton anti Virus says it can't delete it. I've looked at the Norton site and followed their procedure for getting rid of it but I can't start in Safe mode - I get the following message - unable to start in safe mode - windows root>\system32\ntoskrnl.exe missing. Re-install this file. How do I do that. Can I find this on my installation disc?