My Mother's Windows XP laptop appears to be infected by a virus. Her McAfee is not able to update nor run even in safe mode, throwing a generic error that a McAfee developer (in their forum) describes it as a "generic error message" and has no use. (great.) What would be the best method to try and be able to clean the system up from this? One thought I had was to run a Linux LiveCD (maybe BartsPE?), install AVG or ClamAV on the LiveCD and run a system scan from there so the entire hard drive is viewed as a gigantic folder and none of the Windows system, which the virus may use to keep itself hidden/protected, will be running. Or would it be better to get an adapter to connect her hard drive as a USB external drive to a Windows box and scan it? What is generally the best practice for fixing this issue?