Before last night, this had only happened twice, but last night I'm sitting at my computer and downloading some things and erasing unwanted files (nothing important, just old mp3's and crap like that) and all of the sudden...half of the screen goes black with white writing saying all this stuff like "system failure". If I press the reboot button the side of my imac (I'm running Jaguar) it starts up just fine, and everything seems normal again, but this happened about 4 times last night. Anyone know why or what to do? Please HELP!!!!!