Open task manager > details tab
Close every valorant,riot client and vanguard related apps/services
Open control panel > uninstall a program
And uninstall riot vanguard
Open cmd as admin and type these commands:-
1) sc delete vgc
2)sc delete vgk
Navigate to ur C drive then program files and find vanguard folder and delete it.
Then open riot client and click update
Restart ur pc after the update.
After youβre done with that
Press windows key + r
Type services.msc
Look for vgc
Right click on vgc > properties
And change startup type to automatic
And start the services (if not started already)