Virus?

Hi, so my Mcafee subscription just ended two days ago, and i haven't visited any suspiscious sites, just my gmail account. The last time I went on my gmail, the screen just turned black, and suddenly a blue screen appeared saying something along the lines of like computer has a major problem (recalling my memory to the best of my abilities), and then it rebooted itself. Afterwards, all it showed was the sony vaio screen for a period longer than usual, and there was a repeating clicking noise coming out of my computer (not a laptop), after around five minutes of the clicking noise it stopped, and then a new screen appeared with text, but I can only see half of the text, but the entire screen. Im not sure, but I think the text involves the make and information of my computer (windoes XP btw) and at the bottom of the screen, the only thing that helps is that it says <F2> to Run SETUP. I've tried pressing f8 at the vaio screen, but so far, i haven't been able to get to the Windows XP start up screen, or even the menu where it gives the option of running my computer in safe mode. It's always the same thing everytime i try to turn on my computer. Sorry, my knowledge of computers is very limited, so any help on what to do would be appreciated, thanks so much. If this is hard to read, please comment and tell me what to clarify on. Please, I really need your help. Thanks again.