bios shows temp rising

[stfupid]

For some reason when I go into the bios it shows that my cpu temperatures are rising, but in motherboard monitor it displays it as normal (around 40 degrees). Because of this my computer shuts down and now when I boot my computer up it says that I dont have enough memory for windows NT even though it reads it fine on the memory checkup at bootup. Is there a way I can fix this?

 

[digital_exhaust]

Update your bios.....

 

[stfupid]

ive had my computer for almost a year now, why would it be having this problem now?

 

[Gorankar]

Clean dust out of heat sink, update bios, and, if are feeling like living dangerously, disable the hardware protect shutdown in bios...

 

[stfupid]

I've tried updating the bios, but I still get the problem. The bios shows the temperature raising uncontrollably and my PSU shuts my computer down if the temperature gets too high. When I touch my heatsink though it doesnt feel hot at all. Any ideas on how to fix? I can't seem to stay in windows for more than 5 minutes without it getting shut down even if I turn off hardware protection.