I am new here but hope to get some help. I recently built my first PC and it has been awesome. The only things that I am worried about is that occasionally the CPU temps will spike. This happened once right after the build when I was trying to rip a DVD, and recently while importing a ton of music from old machine to iTunes. Both times the problem went away once I stopped what I was doing and I haven't had much time to look into it. Tonight I am sitting here doing nothing more than web browsing and I get another alarm saying CPU temp is at 80c......and it wont go down.
After the iTunes incident, a week and a half ago, I pulled stock cooler and reapplied thermal paste as per Arctic Silver 5's website. Nothing changed and I was still sitting about 45-50c at all times. I don't know what to do from here, like I said this is my first build. I thought I took my time and did my homework but I must have missed something along the way.....here is a screen shot of the incident with HWMonitor and the built in ASUS sensors.

Yes its a 2600K and not overclocked.....I paid the extra money up front so that once I get time to do the research I can begin to play with it. I didn't want to have to buy a whole new CPU when I could spend $30 up front.
It has
16gb Corsair Vengence ram
Antec's TruePower Quattro 850w power supply
Cooler MAster 932 HAF Case
Stock cooler that came with Sandy Bridge Processor, I read that would be fine for stock settings.....
Everything else should be shown on screen shot, if not let me know and I will add to the list.
Any help would be greatly appreciated!!
http://imageshack.us/photo/my-images/641/tempcv.png/