uninstall incomplete after reboot

Avast free installed unwanted. Windows 10.

I installed and ran avastclear.exe. After reboot, I get bluescreen choose start windows 10 or run avastclear. So I reinstalled avast free and ran avastclear again. Same problem, cannot boot automatically into windows 10, I still get bluescreen choose start windows 10 or run avastclear.

I can choose to load Windows 10 but I want to be able to boot directly into windows 10 without having to go through bluescreen choose start windows 10 or run avastclear.

See: https://forum.avast.com/index.php?topic=211965.msg1436346#msg1436346