My computer keeps shutting down...help please!

My computer shuts down unexpectedly...no warnings no error messages. I just installed Windows 7 successfully and it shut down after a few minutes online. Sometimes it shuts down after 2 or 3 minutes, sometimes longer. I was hoping it was a virus, so I did a clean install with Windows 7. Looks like that didn't help. Could it be the hard drive? Is there any way to troubleshoot what the problem could be? Could something inside the computer be loose? Any help would be really appreciated!

Can anyone help me as to why my computer keeps shutting down and restarting ever since I downloaded windows 10 I have been having this problem.

My computer shuts down unexpectedly...no warnings no error messages. I just installed Windows 7 successfully and it shut down after a few minutes online. Sometimes it shuts down after 2 or 3 minutes, sometimes longer. I was hoping it was a virus, so I did a clean install with Windows 7. Looks like that didn't help. Could it be the hard drive? Is there any way to troubleshoot what the problem could be? Could something inside the computer be loose? Any help would be really appreciated!

computer shuts off need password to restart

I hope for you it is as simple as overheating, I suggest you check your cooling fan is working and non of your air vents are blocked. Lets hope this works.

Why does my computer keep shutting down?  I have not changed anything.  Does Microsoft have that much control?

Hi, I had the same problem though I have a laptop, what I did is turned every thing off and used a vacuum cleaner on all the air vents and this don the trick, so if you have a PC you could try to vacuum your tower even take the side off so you can get to the fan, as the could be clogged up with dust. I hope this is of some help.