Having a display problem. My son dropped something on the keyboard and now the display is rotated 90 deg. (have monitor on its side presently) Have tried system restore with no effect. Have a Dell dimension 4200 w/ Windows XP pro and a Samsung SyncMaster 763mb monitor. Tried going through Accessibility options but couldn't find anything there

Any help would be appreciated. Don't think it's a virus but you never know.