Inaccessible Boot Device after installing Avast

Hey there! I just decided to give Avast a try on Win11, and when I ran the installer, Windows gave me a black screen about an unhandled exception. When I rebooted, I get a black screen telling me “Your device ran into a problem and needs to restart. We’ll restart for you.” It does not restart, and at the bottom, it tells me there’s an inaccessible boot device. How can I fix this? I use this machine for work.