We just covered this at http://forums.cnet.com/7723-6122_102-510824.html
You have overlapping protection and while http://forums.cnet.com/7723-6122_102-510824.html found that, it was the new AVG. Let's see if you can dump the overlap then post your HJT log for comment.
Hint: Uninstall Spybot.
I have a Dell Optiplex 170L with Windows XP, SP2, Home Edition. It has a Pentium 4 processor.
Here is the problem, it has become so slow that at times it locks up for 15 to 20 seconds to complete just opening a Microsoft Works file.
I have run Spybot S&D, CCCleaner and McAfee and found nothing.
Today a green square box showed up in the Task Bar. I showed the CPU running at 100%. I checked the computer over several hours and it continued to run 100%. The last time I checked the CPU was constantly varying from about 10% to 100%. I opened the Task Manager and found that as the CPU usage got higher iexplore would go up. I also noticed that I have two iexplore process running in Task Manager. One has a memory usage of 11,128k and the other 90,280k
Can anyone tell me why the CPU runs at 100% most of the time, when nothing is being done on the computer, why I have two iexplore exe's on the Task Manager, and how to fix this problem with this computer. Thanks