Recently my laptop has been acting weird while playing the most simple flash games or watching a video.
PIC
As you can see on the pic, every 3ish minutes, my computer moves to 100% cpu usage and somehow makes the core temperatures drop. This makes it impossible for me to do anything. My computer is ultra laggy for about 10 seconds. Then after that, it is normal again. My normal core temperatures are about 50 degrees, but when I play a game or watch a video it goes up to 90 degrees.
My 5 year old computer:
Ubuntu 12.04 LTS
Memory: 2.9 GiB (Only 21% of this is used.)
Processor: Intel® Core™2 Duo CPU T6670 @ 2.20GHz × 2
Graphics: Mobile Intel® GM45 Express Chipset x86/MMX/SSE2
OS type: 32-bit
Disk: 240.6 GB
If anyone could help me solve my problem, it would be highly appreciated.