[Solved] Help everytime I open any steam games, they immediately closed...

[Manticore]

I was trying to play MHW today and noticed that the game suddenly closed, I thought that was weird considering I didn't install any mods whatsoever..

But then I tested on other games in my library and they also did the same! I really have no idea what's causing this problem, can anyone enlighten me about this? And tell me how to fix it?

Edit: Some games actually work, but bigger games like MHW, Nier Automata, and Doom Eternal seem didn't working which is confusing because I don't have any hardware issues and they worked just fine last night

Edit 2: Idk if it's worth to mention, but I had done a pirating activity before which is about Mafia 2 game (I normally always try pirating a game first to test it a few hours before buying it on Steam, also the game works fine), so maybe it has to do with this problem?

Edit 3: The problem is solved simply by restarting my PC! Still, I have no idea what causing it in first place..