First make sure you can survive a hard disk failure. That is, you have a full backup of that HDD today.
Next look up the full make/model of the HDD and let's try the maker's HDD test software.
HP 23-B010 Desk Top All in One Windows 8.1 (x64)
Upgraded from windows 8
I hope I am not sending msg again, I keep losing it and have to start over!
Last week on powering up I got a black screen with above msg. After some research, I powered up again tapping F11. I got a blue screen, went to advanced options, and chose System Restore. I got error box saying System Restore did not complete successfully: details system failed while scanning file system on drive C.
There was a black screen for a few minutes, then my desktop came up. I ran the error check drive C for file system errors, which came back saying nothing wrong!
I tested computer and nothing seemed wrong, but am now afraid to shut down! However, computer DID shut down twice while I was not using it, and it powered up ok.