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I suspect she has the virus. You may have it now as well. If you have a antivirus program, make sure your definitions are up to date and run a full thorough scan. If you don't have an anti virus program, get one. There is no excuse since there are several good free ones.
She needs to to the same. You both need anti-spyware programs (again free) and you should both use Firefox (IMHO) with the NoScript plug-in rather than Internet Exploder.