After rebooting our PC (Presario 2.7 GHz Celeron running XP) this afternnon, the display came back completely sideways as if the monitor were on its side. I'm not sure if I have hardware, software, or virus problems. Any ideas?
It turns out my son hit a combination of cntrl + alt + one of the directional keys rather than del which flipped the display. Cntrl + alt + the up arrow returned the display. Thanks for the help caperjack.