How do I get my pc out of diagnostic mode?

I put my pc in diagnostic mode to get some programs to work, and get some viruses our, and now it won't go back to full mode, just won't do anything. Any advice?How do I get my pc out of diagnostic mode?
Try this: click Start, click Run, type msconfig, ok. Select Normal, apply, ok. PC will reboot.





If that does not work, virus may have messed up your OS. Consider repairing it. You need the OS installation disc to do it. Here's how for XP:


http://www.informationweek.com/shared/pr鈥?/a>


Procedure is similar for Vista.





All files remain intact after the repair. It is the other method (recovery) that erases personal files and softwares.