1) run Process Explorer and
1) run Process Explorer and kill all suspicious rundll32.exe processes (normally, in most cases it must not be such processes in memory)
2) check services, and disable/stop any named like "autorun" or seemed not must be there
3) download and run w32.downloadup removal tool from symantec site
4) if you make boot scan and there is no viruses, may be there is only traces of them. delete them manually. you can use unlocker tool (google unlocker download)
better is to update ur antivirus regularly. and install the malware removal tool .(note:norton can detect this vius better than other antivirus)
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