I opened my Avast GUI and went into the settings, after that when I hit the Passwords link to edit things there I got greeted with a number of password boxes, one is expected but this must be a very weird bug… If I enter my password into all the boxes they close down and show the settings page all grayed out and I can’t edit anything there!
Are there anyone else who’s had this happen to them? :-\
Here’s a screenhot of how it looks, the language used is Swedish if you wonder! 
have you tried avast repair?
go to ad/remove programs to uninstall avast, on last popup box there is a option to repair avast
any change?
The problem is related to synchronization.
Sorry I can’t find the thread with the explanation.
I think my problem is resolved!
I uninstalled Avast completely, removed the remaining folders in the appsdata folder and under programs, then did a restart between and now I have now installed it, logged in and it works alright, so far!
Although, its rather annoying to get a lot of those boxes, at one time it spammed boxes so my PC froze, lol! ;D
Thank you for your response though! 
det løser sig, det fixar sig til slut … ;D