My computer is dead!help!?

Okay...this is hard to explain but okay...i just got this AVAST ANTIVIRUS SOFTWARE just lately and was letting it scan my computer while i was away...so it scanned and scanned and when i was back...my screensaver was on....so i shook the mouse and tried to get back to windows but then i realised that i can see the start icon and those others small small icons below the screen...what the hel is going on?i can only see the desktop items like my computer...recycle bin and stuff...izit something wrong with my computer and what...and then...i tried using many keyboard shortcuts and the whole screen TURNED BLACK and i cant do anything...****!and well...i just got MICROSOFT WINDOWS XP HOME EDITION SERVICE PACK 2 just LATELY....is something wrong wth the antivirus?the service pack..my hardware?what should it be...and oh ya...i haf two antivirus on the run...avast and avg...so didnt it crash o what?and i have like few gbs of songs...so well?what is the main cause..help!the bst ansnwer gets 10 p

My computer is dead!help!?internet security software

First of all get Norton Anti-virus, it's the best out there and uninstall the others . Second, to recover your system, try this:

1. Boot up with the WinXP CD and at the Setup Screen press the Enter Key.

2. You will be taken to the Windows XP Licensing Agreement. Press F8 to proceed.