product key window

Hello dj Johnson,

If I understand correctly, the Office “Enter product key” window is only partially showing, and the field to enter the key isn’t visible at all. This kind of behavior might be related to a display or UI issue rather than a problem with the license itself.

To help narrow this down, could you please confirm a few details:

1. Did this start right after installing Office, or after any recent changes (such as a Windows/macOS update or connecting a new monitor)?
2. Are you using a Windows PC or a Mac?
3. What display scaling is currently set (for example, 100%, 125%, etc.)?
4. Are you using an external monitor?

It would also be very helpful if you could share a screenshot of what you’re seeing, so we can take a closer look. (Please be sure to hide any personal or sensitive information before sharing.)

I look forward to your additional details so we could look into it further!

Use the product key entry page in a browser instead of the broken dialog window.

For Microsoft 365, Office 2024, 2021, 2019, or 2016:

1. Open a browser and go to https://www.office.com/setup or https://microsoft365.com/setup.
2. Sign in with the Microsoft account that will own the license.
3. Enter the 25‑character product key there (without hyphens) when prompted.
4. Complete the redemption, then install Office from the account page instead of using the old “enter product key” window.

If the key is for an older version such as Office 2010 and the on‑screen window is unusable, verify that the key actually matches the product and version being installed and that it is not a volume license key or a key from another Microsoft product (for example, Windows). Mistyped characters are common; double‑check similar characters like B/8, G/6, O/0, and Q/0.

If, after redeeming at Office.com/setup, a message such as This product key has already been used or The product key isn’t valid (INVALID_PRODUCT_KEY or ERR_INVALID_TOKEN) appears, follow the guidance in the referenced articles to confirm that the key is for the correct product and version and not a business/volume key.

If none of these options work and the product key is valid and for a supported version, contact Microsoft Support using the path in the product key error articles.

References:

• Where to enter your Office product key
• Get help with product key errors on Office.com/setup
• Find your product key for Office 2010
• Office product key errors ERR_MISSING_PARTNUMBER or ERR_INVALID_TOKEN