Hi,
On my Asus I7 w8.1 64, since i put the last version of Free avast, randomly the reboot take a long time to be good and the shut down too.
I tried, Offline install, same issue, and online same problem.
Really to check if it was due to the current version installed, i uninstall it and test reboot and shutdown.
And no problem, reboot is under 20sec, shutdown under 10.
With current version installed, reboot can take 45sec to 3min to do it and shutdown around of 1min.
I know that each pc is a different machine, but with my small test i can say that something wrong.
I don't have any more the previous offline version.
So with the previous version i can check if it's really avast or my pc.
But think that there issue with the last one.
Gerald