Hi,
I got an Acer Aspire 4736Z.
I did try this with both newly formatted windows xp / 7 and both shutdown while booting up.
Sometimes, i manage to see the desktop for a while, then it shutdown without any error or warning.
Sound's like overheat, yes, i did tear it all apart & do cleaning, all the fans, apply thermal paste & still happened.
The laptop won't shutdown if i let the system on BIOS or in windows xp safe mode.
I dont think it is a virus because it is formatted, freshly, and so many times.
Any ideas are appreciated since i am stuck here.