Help I recently got windows XP installed on my computer. But now new problems have risen. => The computer restarts without any warning. I went into the power management options and disabled turning off hard disks and monitor after certain period. But this doesnt solve the problem. => I installed nero 5.5 on my computer. But when I tried to run nero , it gives an error that "the executable file of nero has been modified. Maybe the computer is infected with a virus. Do full system scan and try installing from an original nero CD." I am using the CD bundled with the combi drive. Before installing XP, I had the same problem in Me. Please help me out of this problem.