Valorant Error Code 128 occurs when your Windows or a 3rd party program is conflicting with the Program’s service “VGC or stopping Vanguard.
You have to follow the simple steps to resolve this error.
1. You will need to open the Services.
2. Left click on vgc and go to its properties.
3. After that, change the Startup type to Automatic and Service status to Running.
4. Then press Window key +R, type “mscconfig” and hit the OK button.
5. Enter Into Services and tap on “Disable all”.
6. Finally restart your PC to check if the error is resolved.