What version of windoze do you have? I no longer use avast since it's gotten worse and worse over the years
Then you shouldn't have any compatibility issues caused by avast iirc it was prone "bricking" Win7 when windoze updater tried to update :/
Ech... I'm suprised that avast allows you to boot your PC, not that to run an app that it falsely recognized... *rolls eyes* avast was good back in 2008-2012, but not now