Posted 31 March 2008 - 09:40 AM
Fist of all, I would reformat the hard drive and reinstall Windows. If he never had any protection and surfed the net, his computer has to be infected, real time! Running scans and clean ups from different programs will take a good while and might not do a proper job. Some malware might be hard to get rid of and your system may be corrupted.
Then, I would install Kaspersky antivirus (maybe with its firewall) or NOD32, a good firewall (Zone Alarm), SuperAntiSpyware, SpywareBlaster.
Please post back if we found the solution