I booted up my computer today to see a yellow “Attention” symbol on my avast toolbar icon. I tried to start Avast to see that the UI Failed to load. As far as I’m aware, I have no virus on my computer. I’m unsure if this problem will fix itself or if I need to do something to fix it.
You could try a ‘Repair’ of you Avast Installation.
If the UI is failing to load, go to Control Panel > Programs and Features and choose Avast and then up top choose “Unistall” this will present 3 options, choose ‘Repair’. When completed reboot.