I need help.
What should I do or how to diagnose ?

Acer Aspire V3 - 771G - 6601

i5 - 2450m 2.5ghz
gt 630m
6gb ram

i am dualbooting with both Windows 7 and Ubuntu

Starting games like Team Fortress 2 / Left 4 Dead 2 - Shutsdown computer immediately after loading a map or even connecting to load a map. I have installed both games on Steam in Win7 and Ubuntu as well.
Graphic drivers updated in Ubuntu, I'm still newbie at using this OS.

Note that I have not even entered the game or even played for 2 seconds.

I don't know if this is hardware or SOFTWARE related, most likely hardware. According to specs, the games aren't very high in requirements. I remember playing the last TIME, it shut down and couldn't turn on laptop for awhile, later on worked but can't turn on again until i sent to a technician, but he could turn it on there in front of me.

He sent for a reformat, that's all he did and they removed my Acer Erecovery partition... I have tried the FurMark test, it also shutdown the laptop immediately, literarily immediately as I pressed the "Go" button.

Much thanks for your time in advance.I'd run a memtest86 on this system and verify that it passes about 3 full tests.

Also is this happening both with ubuntu as well as 7? Or just Win 7?Thank you,

I will TRY memtest86 for now. Yes, happens both on Windows 7 and Ubuntu. I might actually try to open up laptop in due time and clean the gpu area, there is a Youtube dismantling video on the same model.

King regards.I'd say its either:

- overheating and shutting down ( heatpipe failure or thermal compound dried up or bond broken between surfaces )
- a fan is not spinning freely and when detected that it stops spinning the system shuts down to prevent damage
- you have a bad memory stick

OR

- a weak laptop BATTERY or troubled power supply with weak battery that is causing a voltage dip and for it to shutdown.