Activate Windows Watermark: What It Means and How to Remove It Legitimately

The “Activate Windows” watermark in the bottom-right corner of your screen means Windows is installed but not activated with a valid license. It does not mean your computer is infected or broken. The legitimate way to remove it is to activate Windows with a genuine product key or a digital license linked to your device or Microsoft account.

What the watermark means

Activation is how Microsoft confirms that a copy of Windows is genuine and used on the devices its license allows. When Windows is not activated, it still runs, but with limits. The watermark usually reads “Activate Windows. Go to Settings to activate Windows.”

Typical limits of an unactivated copy include:

• The watermark itself.
• Many personalization options in Settings are locked, such as wallpaper, colors, themes and the taskbar look.
• Periodic notices asking you to activate.

Core features and security updates generally keep working, but you should not rely on that, and activating is the supported way to use Windows.

Why it appears

• A fresh install without a key: you installed Windows yourself and skipped entering a product key.
• Hardware change: replacing the motherboard is the most common trigger, since a digital license is tied to your hardware. Changing a drive or adding memory usually does not cause this.
• A key that is not valid for this edition: for example, a Home key used on Windows Pro.
• A key used on too many devices: retail keys are meant for a limited number of PCs, and volume keys only work in the organization that owns them.
• A work or school license expired: managed devices can lose activation if the organization’s license server is unreachable.
• Counterfeit or resold keys: very cheap keys from marketplaces are sometimes blocked later.
• A server connection problem: Windows may be unable to reach Microsoft’s activation servers temporarily.

Check your activation status

1. Open Settings and go to System, then Activation (on Windows 10, Update & Security, then Activation).
2. Read the status. It will say whether Windows is activated, and whether it is linked to a digital license or a Microsoft account.
3. Note the edition, such as Windows 11 Home or Pro, since keys are edition-specific.
4. If a message includes an error code, write it down. You can search Microsoft’s support pages for that code.

Check your internet connection and the date and time settings first, since a wrong clock can cause activation errors.

How to remove it by activating Windows

If you have a product key

1. Go to Settings, System, Activation.
2. Select Change product key and enter the 25-character key.
3. Follow the prompts. Windows will connect to Microsoft to activate.

If Windows used to be activated on this PC

Sign in with the Microsoft account you used before. If the activation page offers Troubleshoot, run it. After a hardware change, the troubleshooter may let you pick I changed hardware on this device recently and reassign the digital license to the device. This requires your Microsoft account to have been linked to the license earlier.

If you do not have a license

You can buy a license from the Microsoft Store through Settings, System, Activation, or from a reputable retailer. Make sure the edition matches what is installed. If your PC came with Windows, a license may already be tied to the hardware, so check your PC’s paperwork or manufacturer’s support page.

On a work or school PC

Do not try to fix it yourself. Contact your IT department, since the license is managed by the organization.

What not to do

• Avoid “activators” and cracks. These tools, often found on file-sharing sites, are a common way malware spreads. They also violate Microsoft’s license terms.
• Be careful with very cheap keys. If a key costs a tiny fraction of the normal price, it may be resold, stolen or revoked.
• Do not use registry hacks or scripts that promise to hide the watermark. They do not make Windows licensed, and they can cause problems with updates.

Keep security running on any Windows PC; our guide on whether you need antivirus on Windows 11 explains what Microsoft Defender covers. If you are on an older version, see what to do about Windows 10 end of support.

If activation still fails

• Restart the PC and try again.
• Confirm you are using the right edition’s key.
• Make sure Windows is fully updated.
• Use the activation troubleshooter in Settings.
• Contact Microsoft Support, or your PC maker if the PC came with Windows.

If you are buying a used or refurbished computer, ask whether Windows is genuinely licensed. Our guide to refurbished versus renewed versus used devices explains what the labels mean and what to check.

Quick answers

Can I use Windows without activating it?

Windows generally keeps running, but with the watermark and locked personalization options. It is intended to be activated, so plan to do so.

Will I lose my files if I activate Windows?

No. Activating only verifies your license. Your files and apps stay as they are.

Does the watermark mean I have a virus?

No. It is an activation notice. If you are worried about malware, run a scan with your security software.

Is the watermark removed right away?

Often within a few minutes after activation, though a restart may be needed for it to disappear.