I found this error:
Log Name: System
Event ID: 13
User Name: N/A
: The embedded controller (EC) did not respond within the specified timeout period. This may indicate that there is an error in the EC hardware or firmware or that the BIOS is accessing the EC incorrectly. You should check with your computer manufacturer for an upgraded BIOS. In some situations, this error may cause the computer to function incorrectly.
I see your BIOS is fairly old:
BIOS Version: Phoenix Technologies LTD 88.07 , 1/16/2008
Install the newer one from here: Downloads & Support Documents - Notebook / C Series / C-142
See if that fixes the problem.
's advice: can you test your temperatures with Speedfan? SpeedFan - Access temperature sensor in your computer