Error "Trial version has expired"

The "Trial version has expired" error means that the trial version of this Kaspersky application was used on this computer before and its term (30 days) has already expired. You can only use the trial license once to get acquainted to the application's features. If you wish to use the application after the trial version expires, you will need to buy a license and activate the application with it. For information about license purchase, see this article.