My xp system now takes 6 to 8 minutes to boot. Ran diagnostics, virus scan, spyware scan and removed unused stuff. Used Startup Cop and stopped everything I could. No change. Noticed startup cop was unable to disable one file -- gui_dat.exe. Is that a valid file? how can I find out? I found it in windows\system32. If I rename it or delete it will I be able to reverse it?