One thing to be careful of with virus files is that you haven't got them in your system restore files or you will never get rid of them fully. I asked before but you missed the question, what operating system are you running (and when was windows update last run on it)?
You cannot blame IE for the PC being over run with viri, if the system is left open (unprotected by firewall, spyware protection and anti-virus software) or files downloaded without care then you
will get infected, if you
open emails from people you don't know the same will happen.
As movedgoalposts has just said and I stated in my previous post, clean your system or format it but
while you are doing the re-installation take your pc off the internet/ network and make sure you installl a firewall and anti-virus software as soon as you have windows installed and running (there are plenty of good free anti-virus and firewall programes out there.) If you leave it on the internet connection before you get the relevant tools installed it will be infected before you even realise it.
Sometimes you just have to take responsibility for things that happen to your pc
a lot of problems or errors are caused by the operators and none of us are perfect
