Some kind of malware with multiple issues showing.

I have several issues going on with my cpu at the moment that I believe are being caused by a virus. The first of which is my windows firewall will not and cannot be turned on. I've got the little flag in the lower right hand corner of the screen with a red X on it saying that I need to turn windows security on. When I go to do this a prompt comes up saying The Windows Security Service can't be started. One of the other issues I am having is not being able to download ANYTHING. Something has taken over the task of watching over my downloads. EVERYTHING I have downloaded from pictures to all of these programs to run scans was deemed infected and rejected. I basically had to download the programs to another cpu and put them on disc to install them. Most of the scans didn't turn up anything, so I'm not sure what to do. :confused Any help would be greatly appreciated. I'm attaching the logs from the scans.

 

THANKS SO MUCH!!! =D)))) That's got me cleared up and everything's back to "normal."