Problem with user rights

Hi. My avast could not be run on account with user rights. I got a message “Your license number is not valid”.
But if i change user rights to administrator, all ok.

Thank you!

How many admin accounts do you have in your computer?
Can you post the first part of the license key (before the hyphen)?

2 admin account
1st - standard administrator (not in use)
2nd - me, administrator
and one simple user, which have a problem with license number

the first aprt of key (free) w74977823H1400…