I assume you have McAfee installed? Boot up into Safe Mode with Networking and go to Microsoft Updates, download any Microsoft updates including the Optional ones, then do a check for McAfee updates. Reboot back into Safe Mode and do a full McAfee scan (right-click on My Computer, or the equivalent on your desktop).
It looks like you've got a malware infection of some sort and, yes, botnet herders can take over your machine and make it do what they want. Normally though they don't make so much noise when they do it, it kind of defeats the object of the exercise, which is to keep hidden while your machine is being quietly pwned. Maybe this is a bungling amateur (let's hope).