SysFade
I've been having this problem lately. When I'm running Internet Explorer, it lags horribly, and goes into the "Not Respoding" state. This has only happened with Explorer so far, none of my games has been affected. However, I opened the Task Manager with the Applications tab on and when I.Explorer was loading, an unknown app called "SysFade" flickered up. It was but the work of a second, but I saw the name. I was worried that it might be spyware/adware/virus, but I'm not too sure.