I’m a new Avast Home 4 user. I installed under my normal admin account and entered my key. Everything works fine.
I set up a new user account with administrative privelages. Log into it and I get an error on startup, No license key. I tried to enter my key and I get an invalid key message. I even re-registered and got a new key, log in with new account, same error when I try to enter the new key.
Switch back to the normal admin account and everything works fine.
avast does not work well into multiply admin accounts… sorry to say, but I’ve read this before.
See if the tutorial help: http://www.avast.com/files/tutorials/insert_key.htm
You can try to register in all admin accounts again, one by one.
Side note: I never recommend multiply admin accounts.