License Key

You need the License Key to complete the registration process. When you register your software online, you receive a License Key from Trend Micro via email. After you enter this License Key into the correct field on the PC-cillin window and click Finish, the product is officially registered and you receive the following benefits: a year of virus pattern file updates, technical support, and information about future updates and the latest virus threats.

When you reinstall PC-cillin on the same computer with the original operating system (i.e., you did not reformat your hard drive or install a different operating system), it is unnecessary to re-register your software.

However, if you install PC-cillin on another computer or reinstall your operating system, it is necessary to re-register your software and obtain a new License Key. You must perform the Registering your software procedure and enter your new License Key. Any previously obtained License Keys are invalid and will not work correctly on another computer.