Questions like this are always best posted in the Security forum. But the answer here is an easy one. The virus is in the System Restore archive. To purge it you must disable and then re-enable System Restore.
http://service1.symantec.com/SUPPOR...5065b3834b10031488256b0900255ea7?OpenDocument
http://service1.symantec.com/SUPPOR...5065b3834b10031488256b0900255ea7?OpenDocument