I'm having a problem with me desktop PC. When I boot it, it boots properly, but after reaching at desktop with few seconds, it shutdowns automatically. I am unable to find out the reason. Would any body help me?

I'm having a problem with me desktop PC. When I boot it, it boots properly, but after reaching at desktop with few seconds, it shutdowns automatically. I am unable to find out the reason. Would any body help me?

Can you enter in safe mode;
Reboot your PC, and tap F5 usually to ENTER safe mode,

I suspect a driver or a program load on start up.
Or even a malware, but we must eliminate the possibility
of the start up programs first before try other options.

As you in safe mode go to START /RUN and when the box open
type "msconfig" without "" to open msconfig window.

In there click on start up TAB on top, and uncheck everything
that load on start-up ,and do't belong to microsoft.
Even your anti-virus and firewallif you use any.

You can start anti-virus and firewall from within windows later.
See how it went and post back

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