Valorant and other riot games reestarting my PC

🔧Technical Issue🛡️Vanguard Issue

When I try to open Valorant or League of Legends, my PC restarts. I've already tried uninstalling Valorant, LoL, Vanguard itself, and even reinstalling my drivers, but nothing I've done seems to work. I think the problem is with vanguard, because i used my task manager and when the vanguard starts working the PC crashes. Can someone help me fix this, i want to play again!