I'm at a little bit of a loss and wanted to try asking a question here :)

I own a Satellite L755, the model which includes Blu ray player, Nvidia 525m, 6GB RAM and a few more bells and whistles.

Currently its been showing erratic readouts for temperature even when idle.

I've used Toshiba's built in Health monitor and another program via third party named Speccy by piriform. Both show the following -

Idle state and basic usage - CPU 55\*C up to 70\*C and GPU 58\*C to 60\*C

Videos/Gaming/Heavier Programs - CPU 70\*C to 90\*C and GPU 70\*C to 80\*C

Obviously Temp's like these are something to be concerned about and more so because i cant splash out for expensive replacements should any of the hardware burn out and fail.

Prior to any of this happening i had the laptop running at a much cooler rate running high end programs and games at consistent heat levels, it was after i decided to reformat from scratch and personalise windows 7 my way that things started to creep up. 

I've tried this so far -

Updated the Graphics card from default factory to 285.65 WHQL,296.10 WHQL and the latest 301.42 WHQL. All three updates made no difference,and stressed the GPU even further. I now believe a close friend of mine when he mentioned that default notebook drivers are tweaked for a reason and although nvidia recommend updating, they can cause graphics cards to over work. Since then I've completely removed new nvidia drivers and stuck with factory default which was written specifically for the laptop.

3 days ago i also took apart the main casing and lifted the keyboard and under cover to get at the motherboard to see if i could spot any dust clogging the insides. there was a good deal in the fan and i managed to clear out as much as i could. i didn't dare touch the CPU because i don't trust myself to fiddle with sensitive parts and i don't have any thermal paste to replace the existing layer which is already there. the base of the laptop is also kept propped up on a desk to get as much ventilation as possible but even that seems to make no change.

So I'm after any advice and possibly cost effective ways to prevent my laptop fizzling out!

Thanks in advance :)