Update stop working, after reboot got the notification that Protection may be at risk - databases are out of date. Click on update button from main menu and notification center doesn't help
Anti-virus database updates are downloaded from the test server. Anti-virus databases are downloaded to test servers less frequently than to public ones. The result is expected. But even this has advantages. For example, to observe how the program behaves in this case. Or maybe even find a bug related to updating anti-virus databases.