Random reboots in Windows 7 64bit

[satswid]

PC reboots randomly.
It doesn't seem power/temperature related (it doesn't happen while gaming, it seems to happen when idle or with light apps like web browsing).
Notice that almost all the times, it just reboots, no BSOD.
There's nothing relevant in the event viewer as well.

Attaching the DM Logs

Pls help.

 

[axe0]

Hi satswid,

You are running an ASUS Product ID on a Gigabyte board.
This makes your installation counterfeit.
Troubleshooting a counterfeit installation is useless as it is not known what has been modified to your system.

OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Registered Owner:          xxxx
Registered Organization:   
Product ID:                [COLOR="Red"]00426-OEM-8992662-00173[/COLOR] <-- ASUS PID on Gigabyte board
Original Install Date:     9/11/2015, 8:17:22 PM
System Boot Time:          10/27/2015, 11:44:31 PM
System Manufacturer:       Gigabyte Technology Co., Ltd.

Install a genuine copy of Windows, if you after installing a genuine copy still get BSOD's I'll gladly help.