New computer - P4, 2.2 GHZ, GeForce 3, 2 HD, Zip drive, DVD-R, CR-RW, WinXP Professional. Worked fine for 2 weeks. Son took to college dorm- Now, gets first error message about NTSAPI.DLL and then ISASS.EXE. Black screen and only mouse. Will not boot into XP, either regular or safe mode. Is this repairable or do I have to reinstall? Please help!
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