If you are using Windows XP, you will need to turn off system restore before doing a virus scan otherwise it will hide in there and keep coming back.
Right click on your "My Computer" Icon, choose properties and you will see the system restore tab. Turn off from there and scan to remove, remember to turn on system restore again after you've cleaned your system of this virus and if you wish make a new manual restore point or wait until windows does an automatic one for you.
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