windows suddenly reboots

Hello caeyal

Turn off automatic rebooting
Right-click My Computer / Properties / Advanced / Startup and Recovery/Settings.
Under System Failure, uncheck the Automatically restart check box
You will then get a BSOD with error message which will help identify the problem.
Please post the whole error message.

Does this happen at any specific time?
Are you doing the same thing each time it reboots?

Hi,
1.I am not near the computer most of the day so I don't know when exactly it happens.
2. Yes, I do most of the same things after it reboots.

Attached are 3 jpg shots of the error codes at 3 different times.

Thanks.