If you have a good antivirus program, hopefully it comes with rescue tools. If it does NOT, get another Antivirus program. There are times when things can get sketchy or even very bad and said rescue tools can be VERY helpful. NBRT is one such tool which does come with Symantec's Norton 360 and some other versions of their Antivirus programs. Learn how to use it and make your computing environment a little safer!
Do NOT let your computer control YOU - CONTROL your COMPUTER!