Run your pc on safe mode. To do that you need to force shut down your pc by pressing the power button for 20 seconds, then open it again and press the restart button when the windows is loading, do it again if it didn't work. If it worked follow these process:
- Click on advanced options
- Click troubleshoot then choose advanced options
- Click on start up settings then click restart
- After restarting windows should provide you with different options and choose enable safe mode
- Then on your desktop, press Windows key + R then type "msconfig", click on "Services" and check "Hide all Microsoft services". From there, uncheck the "vgc" process, click apply, ok and "exit without restarting"
- Press windows key + R again then type "services.msc" then find "vgc", right click on it then go to properties, from there change the start up type to "disabled", click apply then ok.
Your pc should start up without going BSOD now.
NOTE: This only prevents your PC from going BSOD on startup and it won't fix your valorant, you'll still experience BSOD when launching the game. I have this same issue and I am still waiting for the new patch hoping that it will fix this problem. I'm sorry for my english and I can't provide instructions well.