Kernel Panic when running larger programs

Kernel Panics can be caused by both hardware and software problems. My bet is that it overheating. Since you have to have it right now, I'd open it up remove the fan and clean the vent and use canned air to blow it out. Next try to run fewer programs at the same time and avoid videos. Start up in Safe Mode by holding down the Shift key on start up. Check in Preferences > Users > Startup items and turn off any un-nessesary ones. If you are a college student go to your campus student site and see if they are giving away (or providing) free anti-virus software, get it, usually Symantecs Endpoint protection. Run it. If your problem persists, save often, have an external Time Machine Backup of your hard drive. Do not use your machine sitting in bed on a pillow - give it some air. Come back after your exams and study hard until the night before the exam. That night take it easy, don't cram and burn your brain out. Go to a movie, if you don't know it by now, cramming won't help.