Acer It shuts off randomly.

[White]

I have cleaned the cooler, its respective fan of the laptop, clean ventilation slots, the disk is 320Gb, RAM 3GB, brand acer, now the reason is that it turns off even when it is turned on. What can be the probability of this failure, even when I'm installing for a new operating system this shuts off randomly after a while during the turn on.

 

[Snick]

Hi Cast,

Several things, either separately or a combination thereof can be the underlying cause.
I don't see your exact model number, HDD or SSD, etc. info that is useful in diagnosis of issues.
System Info - See Your System Specs - Windows 7 Help Forums

Click rb:
in searchbox type
reliability
select view reliability history
looking for :warn: and Xentries

 

[Megahertz07]

Download open hardware monitor
Expand to C:\Program Files (x86)\HardwareMonitor and run it.
On the top menu - options mark
Start minimized
Minimize to tray
Minimize on close
Run on Windows Startup

You can configure what to show on the tray and on the gadget