I've been using Avast for at least 10 years and before installing this latest version I never had to uninstall Avast to install any Windows updates.
Will you please stop all that motion in
your avatar. It is really irritating. Makes it difficult to read other people's post. I have no problem with your message, though some might object, just this constant
motion is intolerable.
A lot of win7 64 bit users have problem with
KB3004394 because Microsoft in their wisdom
broke the certificates. Makes one wonder how AV will function when suddenly certificates aren't there.
Over the years, it's been always my procedure to turn off all real-time security. Make an image backup, download, check the list and install the M$ updates, reboot. All security gets back and all is well with few alerts for the new stuff. Dont't know if this would apply to the latest Avast.