I got this problem with a computer. It's Windows XP and when it boots to the log on screen, you can go to any of the names and nothing but the background loads. CTRL - ALT - DEL and there's this program called power32.exe running. End Task it and the your at the desktop. It's hidden in the WINDOWS\SYSTEM32 folder and I cannot remove the hidden attribute nor can I delete, alter or rename it through command prompt. To me it's acting Viral do to the symptoms. But no virus scan will detect it as a virus.

Any insight?