So the process that is using a lot of resources is EXPLORER.EXE? Does it show up in all capital letters? Well, even if it shows correctly in task manager, if that process is using a lot of resources, there is a good chance for malicious software.
But the question is, what exactly are you looking at when you say resources? Are you on the processes tab and looking at CPU and Mem Usage? That is where you should look and it should sit idle at 00 for CPU and around 20k for Mem Usage. If that is the case, that is totally normal.
Explorer.exe is not the process for Internet Explorer. It is the process that loads your desktop environment. If you end the explorer.exe process, your desktop will disappear.
Let me know the answers to those questions. I may end up recommending that you follow my pre-work link below my post and then post your results in the HijackThis! Logs section of our forum. One of our security staff can take a look and see if you have any viruses/spyware floating around.
We will go from there
