let's get some more system information and get a speccy report.
Do not forget to post the make and model of the PSU if this is a desktop.
Download then run Speccy (free) and post the resultant url for us, details
here, this will provide us with information about your computer hardware + any software that you have installed that may explain the present issue/s.
To publish a Speccy profile to the Web:
In Speccy, click
File, and then click
Publish Snapshot.
In the
Publish Snapshot dialog box, click Yes to enable Speccy to proceed.
Speccy publishes the profile and displays a second
Publish Snapshot. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.