Sorry for the delay, this forum is very busy right now.
One reason your topic has not been answered is that you did not post a HijackThis log for us to analyze.
Please follow the steps in this guide
. It explains the series of preliminary scans you should do and exactly how to download the HijackThis program and run it to produce the log.
When you have the log, post it in a reply to this topic. Also please tell me what the preliminary scans found -- the exact names of the malware such as 'Mydoom' or 'Vundo.' This information will be a huge help in devising a plan to clean up your computer.