PC starts running, Monitor turns on but gets stuck on the loading page

So, previously I didn't have any troubles with my PC but recently I made a mistake turning off the power-switch before shutting down the PC (and I've already made this mistake before) and now when I open my PC everything is running but it takes me to the loading screen and never leaves that page.

For background info my PC is built from scratch so made of different components so no specific type of PC can be named (sorry).

So I am wondering if anyone knows how to fix this and get my PC working.