Trend Micro Internet Security Software is a retail product, so the serial numbers are only valid for a year from the time you install and register the serial number with Trend Micro.
You will need to request new serial numbers prior to the expiration date. If you have received an email from the Information Security Department and Trend Micro that your subscription is about to expire and would like to upgrade your software, you can request a new serial number from MD Anderson. This should be done annually.
Upgrading to Trend Micro Internet Security
Make sure your system meets the new minimum requirements. Then, register for new serial number or use your existing serial number if it hasn’t expired: