I had something tore-up in the network section on my laptop, ran all kind of AV, malware deleters...got tired of doing all that and still was a problem.
Registry cleaning didn't help either.
I figured out to turn off IP helper and a few more that kept it from pegging the processor.
Anyways since I had MS OS disc, I went ahead and reinstalled the OS.
That really worked well.
I think after much time.. and especially if one does installs and uninstalls, the best way to handle it is to reinstall Windows.
Really the problem I had was the network part of the OS, if that stuff gets out of wack....at least I couldn't figure out how to fix...even after much googling.