OS X :: Error Messages Popping Up - Several Different Languages - Restart Computer

this is my first post here and i hate that it has to be on these terms. however, my mac mini today just out of no where popped up with an error message stating "you must restart your computer...." and so on in several different languages. im not a total noob...so this shouldnt be racking my brain like this. ive read every website and forum relating to this subject, and nothing anyone has to say seems to help. i understand this is a kernel error this message pops up quicker sometimes than others. sometimes it pops up at the blue screen just before my computer prompts me for my password. sometimes, it lets me log into my computer, then the error message will appear. and sometimes it wont even make it to the blue screen, it just gives me a gray screen then the error message. ive tried booting in safe mode and it lets me log in, loads my icons and my desktop, then as soon as i click a single click on the mouse, the message pops back up. ive read some people saying to try reinstalling osx, or to try loading the install disc and repairing some things. i cant get the computer to even seem to boot the disc when i put it in. i am trying to avoid reinstalling osx but if i have to reinstall osx, then i will. i did NOT install anything, upgrade anything, change any system files, change any hardware or anything. i was just downloading a torrent, left my house for a bit, came back and the error message was there. im a graphic designer with work that needs to be done...i can't have a broken computer. does anyone have any clue what to do?