Alienware CPU Usage Issue

A year ago in April of 2013, I got an Alienware computer. It had been working completely fine until a couple months ago, December of 2013, it had gotten a CPU usage issue. What would happen is, if I were to just start my computer and wait 5 minutes, I would open my task manager and it would flicker from 0% to 80% in a second, 2% to 60% 5% to 96% 40% to 100%. It would flicker with absolutely nothing open. So I completely wiped the hard drive and restored it back to factory format. It worked great until last night, 2 months after the wiping. I shut off my computer to go to sleep and this morning when I woke up I wanted to play Minecraft or just do whatever. I realized that the game was being unusually skippy/laggy. I checked my task manager and the CPU usage was around 80%-100%. That's not normal, it is usually 20%-40%. I checked the processes on task manager and it really didn't add up. I closed Minecraft and it was still going. I realized there was a javaw.exe program still open. I close that and my CPU usage went from around 90% to 5% in a matter of seconds. So, thinking maybe it was just Minecraft, I decided to open another game that I previously had problems with when I had the CPU usage issue. I opened the game "APB Reloaded" and normally, it would go to 30-50%-ish when opening the launcher. It went to around 80-100%. I opened the game and it was quite laggy when it is normally not. It was at around 30-40 frames when it is usually at 60. I checked the CPU usage and it was around 90-100 just like Minecraft. I waited about 5 minutes and it just instantly vanished. The CPU usage was at 30-40 like it usually was. There was no problem. I played the game for about an hour with absolutely no problem at all. I thought, "Hmm, maybe it is gone and it was just a faulty start". So I decided to try Minecraft again the and problem kept happening. I closed Minecraft and the same javaw.exe was still there. I let it sit there for a good 5 minutes thinking maybe it was trying to update something behind the scenes. So I left it to do that. I came back 5 minutes later and it was still there but my CPU usage was at 0%-10%, like normal. I opened Minecraft again and now there was 3 javaw.exe's. And my CPU usage was back up to 90%-100%. I ended the 2 javaw.exe's except for the one that was actually running Minecraft. The lag was gone, the CPU usage was down to a normal scale. All was fine. It all worked completely fine with no issue. But what concerns me is, why do I have to suddenly close that extra javaw.exe? It was not like that just 12 hours ago. What happened while I was asleep? Did something somehow get installed? I'm not sure what to think here. So what I decided to do was get all the windows updates that were needed, sometimes I just don't get them because I am in the middle of something and forget, I updated Nvidia, I checked for a java update, there wasn't one so I just reinstalled, and rebooted to get everything configured, then tried running Minecraft again. The problem was still there! Right now I am running a complete Mcafee Scan. It's at 33% with 102,000 files scanned. There is not 1 virus detected. While doing this scan, my CPU usage is flickering between 20% and 60%. I find that somewhat normal because it is a program scanning through all of my files. I am going to let it sit here and wait for the result. I am expecting to find no viruses and if I don't then I am not sure what to do here. I have talked to my friend about it and he has said to update my processor which I am hoping to do in a month or so. But until then I'm not sure what else I can do. I just want to know what could have happened during the night. My PC specs are: Processor: Intel(R) CPU @ 3.00 GHz RAM: 8.00 GB. Windows 7, Alienware, 64-bit OS. Video Card: GTX 660


Just something else I would like to add. I have been having the McAfee scan running for about an hour and the normal CPU usage is 100%. I know this isn't normal, so I think my computer is having some type of issue again and I might have to wipe it again.