PC Shield sounds a bit iffy is it actually a normal anti-virus program or a Rogue one.
Maybe make sure he has a good anti-virus and ant-malware programs downloaded.
Malwarebytes and superantispyware sound Ok but maybe just try malwarebytes first to see what it finds.
It could be Pc Shield is a rogue program that will scan then want payment for removal If so it may be harder to remove.
You should have posted this in the Helproom where you would have got more support.
Maybe get FE to move it for you.