I have WinXP Pro on a PIII 600MHz. I already scanned using AdAware, and cleaned whatever thing that it found. Also, i also scanned for viruses using AntiVir. Im at an internet cafe so, I'll just test your suggestions (by Khronic) later..
EDIT:
Btw, this has happened before I even tweaked my modem settings..
EDIT2:
Tried disabling the auto restart thing, wel.. it still crashed and they have to reboot the system..