downloading a dvd burner program from cnet.com. I need some help trying to get my computer back in order if there is anyone out there please help!!!

Symptomns
:initially error was a "bad image" in .dll files ruined all my run32dll files.
:would not allow me to access the internet
:Initially the image on the onitor worked but when i turned the computer off and the pc turns on but no bios screen appears and my monitor does not turn on
:my monitor works because i am using it on my second computer.
:"the sun virus" may be a worm i am not to positive and it destroyed

can my pc be fixed ? or is it beyond repair?

computer specs 900 mhz Amd Fic motherboard az11 ( first international) Ati rage 2 512 memory stick. windows xp professional, 80 gb hard drive