Pre-installed Windows help

[DCM]

Reet, my father's HP computer has been struck down with a virus, of his own fault (clicking on a dodgy link, and now at 78 years old, he is getting very rude sites coming up, at my amusement).

What are my options?? Currently I have run AVG in safe mode, and it is still infected.

The Virus is the one that tells you your infected, and by running it, infects more. I am not sure if running the factory reset function, to bring you back to a clean install will work (boot sector infection maybe?).

Can Sanitise the hard drive, as will lose the Hidden Partition.

Help please guys.