Why does my computer shutdown then restarts itself?

Answer 1

my pc does the same thing, its on for about 3-4 minutes then starts itself up again. really annoyin! if you find out how to sort it please let me know and ill do the same for you.

Answer 2

computers shutdown when any of your hardware is in danger of failing or overheating
sometimes it may be trivial,but microsoft dont want you to blame them when your prize processor goes up in flames
however if you want to stop these shutdowns and restarts,you can by right click my computer>advanced>start up and recovery>uncheck "automatically restart",this will stop the shutdowns but you still need to locate the problem
for starters clean all your fans,including c.p.u fan and all chassis fans,also check all cables(ide,power) a loose cable can cause shorts which will cause shutdowns,which means it could also be your p.s.u(power supply unit)
the best way to find the problem is by checking every single part of your p.c,it trial and error,but my moneys on your cables as i had a similar problem myself and it was a loose ide cable,infact the clip on the cable that attaches to the hard drive(20 pin connector)
but basically your p.c is shutting down to prevent hardware damage
i hope this helps
good luck

Answer 3

What you may be experiencing is an automatic update. I receive a countdown alert before mine forces a reboot, but that may not be the case if I was to disable that feature.

Forcing the reboot is evil when, for example, you're not at your computer but still doing something online like downloading files.

Answer 4

us ally its caused by dust or fluff in your prosseser fan duct laptops are prone to this the fan speeds up &sounds loud then computer shuts down clean out all ducts

Answer 5

You could be overheating, or your power supply might be going bad. Download SpeedFan to check your temperatures and voltages.

Answer 6

Evaluation versions of Windows will do this after their evaluation period is up.

Answer 7

maybe your computer is a piece of trash