After restarting a few times and trying to get my USB tool kit to work,suddenly pc wouldn't boot anymore.

Problem is,I couldn't get to that,I managed to once get to windows automatic repair tool but I couldn't do anything, M&K weren't powered or detected. After trying to fix that with cmd scans and commands I concluded that I need to repair windows or install it new. The only things that worked and stayed open were the browser and the task manager. All apps kept closing itself if I try t open any windows option window it closes,same with Xbox apps and discord opens but doesn't fully load and stays gray. The pc restarted just fine but with a catch. It started of with a black screen while playing a game then right after wit a blue screen. Yesterday I ran into an issue with my pc. Note: even before this I kept getting random blue screens of windows TDR or tdlr? Something along those lines for a few weeks but never causing an issue. My budged is low but affordable so I would like to get it right by either getting a new PSU or a motherboard.

Now my issue is, does the problem come from the PSU and needs a swap or does it come from the connector on the motherboard? By that I guess that it's an overheating issue caused by the 4 pin. If I remove thét cable, the backside gets slightly warm and the pc runs without t shutting down. When you connect the 4 pin power conector to my motherboard the backside of the CPU gets burning hot fairly quickly and the pc shuts down after that it just goes into a loop.

Download 4 pin fan pinout for free