I am new to linux. I have just installed Mint 14 32bit with cinnamon on my Toshiba Satellite L300 Laptop. The CPU is running at high speeds and the fan constantly running in high speed. My laptop is overheating and shutting down my laptop in about 15 minutes. Before installing mint, I had Ubuntu 12.10 on this computer, and the samething was happening. Prior to installing linux, I had windows 7 on this computer for several years without any issues. Any suggestions on what is causing this?