wurstturm

Server restart which led to those errormessages

The Server restarts because it's currently in the stresstest. Wait till they're back up and you shouldn't have this kind of issue anymore

Your Antivirus possibly deletes files. You should be able to configurate your Antivirus, so it doesn't delete all the files

Enter the Forum Email + the Password. Retype Email and Password if you get the "Account Activation Error". The Problem is because of the servers or you're using Tab to write your password into the Login screen