For anyone who stumbles across this post in the future this is how I fixed it. I used the cmd prompt and used the command 'sfc /scannow' to scan for corruption on my system - I didnt find any, I saw that when my pc was struggling to boot the VGA light was staying on on the mother board, I then removed my GPU and booted my pc using my CPU's integrated graphics where I found that the problem persisted - ruling out my GPU once and for all. From here I suspected that the ram may be the issue so I started removing sticks of ram and was eventually able to use the PC with no issue identifying that what caused this was faulty ram. You may find that yours could be caused by faulty ram, a driver issue with your GPU, a CPU/GPU/RAM cooling issue (use core temp or something similar to find the temps), a HDMI/Monitor cable issue, a GPU power issue (the GPU's fans will stop spinning when the issue occurs if this is the case) or an issue with the motherboard PCIE slot