Going to try to be as detailed as possible here, so bear with me!
This start late last night while I was playing Final Fantasy 14, after playing with no issue for several hours, suddenly my game froze and both monitors displayed scrambled horizontal bars. I was actually testing my old Radeon 6950 at the time to see if it worked, so I figured it had overheated or malfunctioned, so I waited a bit and started my computer again.
Upon starting up, after about 10 minutes of using Skype, Comodo Dragon, and Steam, each program started not responding one at a time moreorless, including explorer.exe, and task manager refused to open as well, forcing me to do a hard reset.
At this point, I swapped out the 6950 for my currently typically used GTX 670 and started up again. I ended up getting the same issue. I then shut down and booted in safe mode to see if I'd have an issue then. At first it seemed okay and I was able to use my computer for over a half hour, but eventually it did freeze up the same way and I had to shut down.
I then suspected it could be RAM malfunctioning, and proceeded to switch out the 2 sticks I had in for one I used to use. This still didn't help. I tried other slots as well to no avail.
I then proceeded to start up a few more times while trying to search for anyone who may have had a similar problem in the past, though wasn't able to come up with much.
Strangely though, eventually my computer just seemed to be working fine, I even tested playing games and had no issue. I used it for about an hour before heading to sleep (it was nearly 6am at this point).
Even though I have no suspicion of this being a malware/virus issue (I haven't downloaded literally like anything for a week, checked processes/services, did some quick scans, etc), I decided to leave MalwareBytes to do a full scan overnight.
Upon waking up, I noticed my computer was sitting on the boot screen displaying 'Loading operating system...' and was stuck at that point. I restarted it once and had the same thing happen. I restarted once more, this time going to boot options, and selected the main hard drive, and after doing this it booted up like normal.
It worked fine for about 3 hours then before it started freezing up again, this time (before I decided to do a hard reset) quickly went to a BSOD, which unfortunately disappeared nearly instantly so I couldn't even check the error code.
I went to boot back up again, and it proceeded to do the 'Loading operating system...' issue again, and I had to select the boot drive again. After this, programs began freezing up again after about 5-10 minutes of use.
I'm now in safe mode and it's survived thus far for about 15 minutes.
I currently suspect my hard drive, and which I can replace if necessary, but would like some confirmation on my suspicion, and also would like to know if there is a way to repair it.
I just looked in my event viewer and seen some things that may be of use...
The most obvious thing I noticed is that for over a month there's been Error's stating 'The device, \Device\Harddisk0\DR0, has a bad block.'
I also see 'The driver has detected that device \Device\Harddisk0\DR0 has predicted that it will fail. Immediately back up your data and replace your hard disk drive. A failure may be imminent.'
Some others that may be relevant...
Driver detected an internal error in its data structures for .
The file system structure on volume C: has now been repaired.
After finding this is my event viewer, I think it's pretty clearly my hard drive. Any chance to repair it?
Thanks for any help!