1. the system has been rebooted during high temps...@ 400K = 166.85 deg C... thats way high.... clean the CPU and Graphics card fans ...
2. the last 2 BSOD .... are related to the Graphics card....... again based on what you said
the screen turns to a screen with blue,black, cyan and green.
These things happen when there is problem with the cards either hardware or software.i would suggest you do step 1 first.
3. Please update Windows to SP1...
4. use the Hardware detection tool
and the Acer updater
as per your manufacturer to update all drivers. Also your bios has updates as well
Do these and let me know your feedback