Complete Antivirus 2008 Removal

A few days ago, the Antivirus 2008 pop-up appeared on my friend's new computer. It stated that he had 41 infections. HIs access to the internet was blocked, as well. In order to remove them, he had to pay for the service. After a bit of research, I discovered that it was a scam and attempted to remove it from his computer, via standard means (control panel, programs and features, uninstall). It appeared that some files were removed, but some were left behind. Those that remained still indicated that he had 41 infections and blocked his access to the internet, by indicating that the websites posed a threat........