What is causing my problem?

I had been having an overheating problem with my MacBook Pro 17".
It took a while but I figured out that my NETserver had been turned on (not by me) and the CPU was running non-stop doing something (figuring it to be malware generatd) that was causing the overheating problem.
Using the activity monitor I quickly found out it was NETserver causing the problem. I shut it down and it keeps coming back.
Any idea where the source of the turining on of the NETserver might be residing?
I also noticed at the same time I get a recurring pop-up for RealPlayer wanting to download stuff. Could the two be linked? Since I don't use RealPlayer at all I deleted the download app, but we'll see if it comes back. I find the coincidence to be a bit more than just a coincidence.
Any toughts would be greatly appreciated.

ugh...Realplayer...that thing is nasty, keep it off your computer at all costs; it is considered malware by many sources.  It may or may not have to do with the other problem.

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