Okay, just going to give an update while you're asleep (tysomuch btw for trying help me out at like 3 or 4 am your time, that means a lot).or
DISM /Online /Cleanup-Image /RestoreHealth /Source:esd:C:\ESD\Windows\sources\install.esd:1 /LimitAccess
my internet stopped working half way through a post
you might need to change C to D since that is where the image file is.
I did a repair install then the DISM thing with command prompt. It worked so I did the SFC scan thing afterwards that the page you linked me told me to do.
Then, I tried restarting with only the DP cable on the monitor and it showed the GIGABYTE logo but when it came time to start windows, no signal again. I guess it really is just a Windows thing that I have to wait for an update to fix.