yes I can start the interface, but it appears to be the same as before with 4.1.
I thought I was back to 4.1 having used system restore.
The computer is running normally but no indication I am on 4.5 other than when I look at about avast to see version.
After restart icons were missing and when I attempted to do anything the comp froze.
Hope this helps after my confusing you.
Mal