I won't consider reverting back to 7 on either the desktop or an old Compaq (Vista originally)laptop. Had to uninstall Avast free on the 64-bit version for a while, blue screen problems, but was ok on the 32- bit. Now up and running OK on the 64 - bit version after a long awaited update. Don't like adding 'patches' to a security program.
Printer (Epson) works fine with Win 7 drivers and no complaints from me.
Zone Alarm will be compatible soon I'm sure, took Avast time enough!