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Your Activation Code is available on the Worry-Free Services web console in ADMINISTRATION → License Information.
The Activation Codes has 37 characters and looks like: 
wf-xxxx-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
The Registration Key has 22 characters and looks like the following:
wf-xxxx-xxxx-xxxx-xxxx
Registering and activating your copy of Worry-Free Services entitles you the following benefits:
  • Updates to the Worry-Free Services pattern files and scan engine
  • Technical support
  • Easy access in viewing the license expiration update, registration and license information, and renewal reminders
  • Easy access in renewing your license and updating the customers profile
When the full version expires, security updates will be disabled; when the trial period expires, both the security updates and scanning capabilities will be disabled. In the Product License screen, you can obtain an Activation Code online, view renewal instructions, and check the status of your product.
Note
Note
For information on merging resgistered licenses, see http://esupport.trendmicro.com/solution/en-us/1059341.aspx