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If you're seeing an "Invalid Activation Code" error while trying to activate Trend Micro Maximum Security, Internet Security, or Antivirus Plus Security on your Windows device, follow these steps to resolve the issue.

Error Messages You Might See:

"You have not provided a valid activation code."
"Invalid Activation Code."

Why Did This Happen?

  • You may have typed your activation code/serial number incorrectly.
  • Your activation code is not compatible with the Trend Micro app you installed.
  • You’ve got a new one for your subscription.

How Do I Fix This?

Try these steps first:

  1. Check your activation code.
    • Online: Find it in your Activate Your Subscription email.
    • Retail: Look on the receipt or product box.
    • Existing Subscription: Log in to your Trend Micro Account to find it listed under your ongoing licenses.
  2. Make sure you're entering a compatible activation code. Different Trend Micro apps use different activation code formats. See the formats below:
    • Maximum Security: Xxxx-xxxx-xxxx-xxxx-xxxx
    • Internet Security: Pxxx-xxxx-xxxx-xxxx-xxxx
    • Antivirus+ Security: Axxx-xxxx-xxxx-xxxx-xxxx

    NOTE: All codes follow the same 20‑character format, but they only work with the product they were issued for.

  3. Enter your activation code carefully. Ensure there are no typos, missing characters, or extra spaces.

Still seeing the error?

If you're still seeing the error, try these methods:

METHOD 1: If you are a new user, create a Trend Micro account:

  1. Go to Trend Micro Account Setup.

    Activation Portal with Get Started Button

  2. Select Get Started.
  3. Enter your email or mobile number, then click Next.
  4. Create a password, then click Next again.
  5. Complete your profile details.
  6. Enter your activation code and return to the Trend Micro installation window to re-enter the code.

METHOD 2: If you already have a Trend Micro account, sign in again:

  1. Click Sign In.
  2. Enter your email and password.
  3. Follow the prompts to activate your protection.

METHOD 3: If you have a new activation code, register it:

  1. Go to Trend Micro Account Setup.

    Activation Portal with Get Started Button

  2. Select Get Started.
  3. Sign in with your email or phone number and password.
  4. Enter the new activation code and return to the Trend Micro installation window to re-enter it.

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