Hi

Internet Antivirus Pro = Rogue Security program, these start on start up and succeed or attempt to on infection disable to some extent your Legit security software.

Don't forget with malwarebytes to complete the removal process, some have not realised.

Ok if something is still stuck possible trying to load on startup, Try Hijackthis http://www.trendsecure.com/portal/en-US/tools/security_tools/hijackthis Download the 3rd .exe (executable) version run and create a log then post.

Malwarebytes may run under "Normal Mode" depends on how the Rogue works. Don't forget to click "Full Scan"

Quads