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You may see this error message when trying to activate your Trend Micro Maximum Security, Trend Micro Internet Security, or Trend Micro Antivirus Plus Security program:

"You have not provided a valid serial number."

You have not provided a valid serial number.

Your serial number is the 20-digit activation code you can use to register your Trend Micro program.

Example format: XXXX-0000-0000-0000-0000.

'X' represents a letter; '0' for a number.

Why did this happen?

You may have entered an incorrect combination of your serial number. You may also have been provided a new one for your subscription.

How do I fix this?

Get help from our experts

If you're unable to activate your Trend Micro product on your own, don't hesitate to seek assistance from our experts. You can get in touch with us by giving us a call or starting a chat.

I can do it on my own

If you feel capable of activating Trend Micro Security on your PC, just follow these three simple steps.

Double-check the serial number you typed depending on where you purchased Trend Micro:

  • Online: You will see it on the Order Confirmation Email.
  • Retail: Check on the Receipt or Product Box.
  • Existing Subscription: Log in to your Trend Micro Account to see the list of your ongoing licenses.

If the serial number matches with what you entered, follow theses steps:

Expand All
I am a new user
I already have a Trend Micro Account
I have a new serial number
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