Stupid error

Ok so as some of u might know, my computer has a virus.
I am currently re-installing vista (cos that's what you do
to re-format vista computers) and after it installed some
files, it had to restart. But when it turned on again, there
was an error before the windows screen that said "A disk
read error occured ... press ctrl+alt+del to restart"
So i click it and restart but the same error keeps on occuring.
There is no cd in the dvd drive so i dont know how to fix.
If any of you have experienced this before or know how to fix,
please let me know. I'm on my laptop btw.
Good Job Fucking Up My Computers Guys

well did u try using a virus deleter or something lol than if u had any problems a registry fixer caz i did that and my computer is fine also i think u damaged ur cd or something caz that what happened to me i had to redownload the OS and burn it on new cd