well the reason i asked for you to do all that jazz is because there are some particularly nasty malware and viral infections that will disable the task manager so that you can't stop them from doing what they are doing....from these tests i'd say that you've got one of those soooo...
Please go to the malware
forum in my signature and follow the instructions at the top....Especially the CLICK HERE .
That will give you several steps that will help you clean up 70 percent of all problems by yourself. If at the end of the process you are still having difficulty--and you may not be-- then post a hijackthis log in THAT
If you are still having problems after getting a clean bill of health from the malware expert, please return to this
when you get to the step about posting a hijack this log...please post a link to this thread along with your log so that they will know what's been done (pretty much nothing...but)