Sorry about the preamble, I get to my question about five lines down.
I am running windows 7 64bit with Kaspersky Internet Security 2013.
Recently my computer started to play boring "supermarket type" music when I opened ether IE9 or Firefox.
I think it was after I watched a YouTube video. Kaspersky, including a rootkit scan found nothing, neither did a Malwarebytes full scan.
As I have Macrium Reflect updating every day I finally restored using the latter, and the problem seems to have gone.
I downloaded HitmanPro to make an additional check for viruses. When I run Hitman, in normal mode the computer completely locks at 7%, and in safe mode I get to 56% (system32/*), and it locks completely.
The computer is performing completely normally apart from it won't run Hitman, and maybe I am worrying too much. Anybody have any ideas? Thank you all in advance.