I'm actually running AVG AND Mcaffee

No, I'm not paying for mcaffe; Even though my trial expired, for the most part I can still use some features on it -
AVG didn't detect this virus at all, though it has detected other ones that Mcaffee didn't find. Using them
Yes, it is indeed the actual iexplore.exe,
and what is the best way to get Firefox?
Usually with this many programs, CPU usage is about 15% -the virus is probably taking up the rest. At times, it's gotten all the way to 100% and stayed there.