As the topic states, my computer will no longer load to the login screen. It is a 4½ year old desktop with Windows 10, an i7-4770K @ 3.50GHz processor, GeForce GTX 780 graphics card, 16GB RAM, and an SSD. Firstly, however, I would like to mention how the computer has worked before this problem:
It has never had any problems (apart from one point when I had to remove some dust from its interior, which is not the case here), and it has always been running smoothly in every way. However, a few months ago, it started showing some odd behavior - every time I started the computer, it would freeze after approximately 10 minutes; firstly, whatever was moving on the screen stopped moving, and then the mouse and keyboard froze when I tried to use them. Since then, I have managed to save my important files on a USB stick in case it got worse by the time I would be able to start trying to repair the computer. And then it got worse.
THE ACTUAL PROBLEM
The computer always starts and shows the usual boot screen (Press X to do X etc.), but instead of continuing to the login screen, it continues to a black screen and stays there no matter how long I leave the computer turned on. So basically, all I ever see is the black screen. However, I can spend as much time as I like in BIOS or the F12 Boot Menu, so I guess it's not because my computer freezes. The problem now is that I either want to start my computer in Safe Mode, do a clean install of Windows from my USB stick, or somehow reset my computer. But no matter what I do and which way I try to do so, I cannot get past the black screen.
I'm by no means a computer expert, so bear over with me. There may be some missing information, in which case I will do my best to provide it.
Additional information: Nothing overheats (CPU temperature stays around 45-55 degrees C), plenty of space on the SSD, I don't remember anything about major updates but I don't think the problem was caused by such an update.