Upon installing windows 7 i immediately intsalled avast antivirus and did a full scan. A trojan horse was found in the old vista files which after update have been changed to windows.old, will this trojan horse still be active from there?
Shouldnt be a problem, however the windows.old folder is for older documents and settings...do you already have your important documents backed up? If so you can just delete the windows.old folder.
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