I've used XP for several years, but have never had this type of problem on my pc. When I type in CMD in windows Xp for some reason my command line comes up and then disappears? I've tried to open it many ways - from the start menu, from the run command, from the actual program file... but it all does the same thing. Does anyone have any suggestions on what it could be? maybe a virus? What is wrong with my system all of a sudden, and what can I do to fix it?