valorant isnt launching pls help asap

Everytime i try to launch the game from either the ''riotclientservices'' or the game itself, it launches but occurs in a black screen for a couple seconds which is not more than 2. Then it crashes immediately, i have tried to end the task of riot client from the task manager and restarted my pc but its still the same problem over and over. youtube vides aint helping, so yall help me atleast