Hi there my laptop currently have some weird issues.

my laptop shut down without bluescreen. It HAPPENED randomly. I dont think it should

be overheating problem because i've just applied new thermal paste and keep an eye on

the core temperature.
The randomly shut down occurs more during starting up the laptop. It normally shuts

down few time before i reach the logon screen. However,  it STILLS shuts down when

i'm in normal use like surfing the web, downloading, or even when i did nothing.

windows event viewer log shows kernal-power, 41(63).

besides, there's issue where my laptop cant power up using battery now. The battery

still working when i start up using adapter and then take off the adapter.
I'm not sure whether this two issues are related.First question - was your laptop doing this before you "just applied new thermal paste"?

My Acer 5740G will ocassionally just cut out for no reason, but not OFTEN enough to be a problem.

Have you tried reseating everything? You could have dislodged a component.yes, it happens before i applied new thermal paste.
i've tried PUTTING my harddisk to my FRENS laptop(same model with mine) which run just fine.
besides, i've tried putting my frens battery on my laptop to try and boot up with battery, failed.