Any suggestions? VTSTQ.DLL W32/Backdoor.kzt virus?

I had a couple of virsus's show up and they sut down my Norton (one of them was called SpySheriff) and I was not able to turn it back on and so I installed Earthlink Virus Protection Center since it is free with my Sprint DSL and I ran all the scans from SpyBot, Ad-aware and Earthlink and all was good. One day later a window from Earthlink popped up and said I have a few virus's called VTSTQ.DLL W32/Backdoor.kzt and LOADADV711 %26#123;1%26#125;.EXE and w32/KillAV.gen and CA1.EXE........Any help would be appreciated....It is making ym computer so slow that I can not even run a scan.

Any suggestions? VTSTQ.DLL W32/Backdoor.kzt virus?internet security

Try these.

For online AV scan, try the websites below:

GFI E-mail Security Testing 鈥?br> http://www.emailsecuritytest.com/...

Port Scan Security Check -

http://www.sdesign.com/securitytest/inde...

Shields UP! -

https://grc.com/x/ne.dll?bh0bkyd2...

Sygate Online Services -

http://scan.sygatetech.com/

VMon -

http://home.ahnlab.com/english/...

Panda ActiveScan Security Check -

http://www.pandasoftware.com/activescan....

Online Malware Scan -

http://virusscan.jotti.org

eTrust AntiVirus Web Scanner -

http://www3.ca.com/securityadvisor/virus...

BitDefender Free Online Virus Scan -