Stop opening up attachments in your emails. No matter who they are from, stop opening them. Don't even open email attachments from your mom, dad, brother, sister, best friend, etc etc. You won't keep getting these viruses if u do that one simple thing. I hate antivirus software, it just slows down your computer, and u can attest to the fact that it doesn't always work. I don't have antivirus software, and I don't get viruses, that's because I never open attachments.
I would also recommend changing your email address. Use hotmail or yahoo for people u don't know and online stuff. Don't give out your personal email address except to personal friends and family.
What are the specific viruses that u have? Some of them are no problem to get rid of, others are a bear. U can go to
www.mcafee.com and look them all up in the virus library there. It tells how to dispose of them as well. GL!