You see this error message while activating the program:

This serial number works for another edition of Trend Micro security software

Why did this happen?

You installed a Trend Micro program that is not compatible with your serial number.

What should I do next?

Close the program, then download and install Trend Micro Internet Security for Best Buy here.

If you got the program from your Internet Service Provider, download below based on the serial number it starts with:

For M1 subscribers having issues, contact their technical support.

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