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How to Find Your Office Product Key and Install on a New Device
Question details
The user needs to locate their previously activated Microsoft Office product key to reinstall and activate the software on a newly acquired computer.
- Product
- Microsoft Office
- Device & OS
- not provided
- Scenario
- Setting up a new computer and transferring or reinstalling an existing Microsoft Office license.
- Observed behavior
- The user is unable to find the original 25-character product key and needs a digital method to access their software license and installer.
Ensure you have the login credentials for the Microsoft account that was originally used to purchase or activate your Office software subscription.
Install Office via Your Microsoft Account (Recommended)
Most modern Office purchases are digitally linked to your Microsoft account, completely eliminating the need to find the original physical product key.
If your Office license was previously activated, Microsoft has already tied the digital license to your account. You can reinstall the software directly from the web without entering the key again.
Open a web browser on your new device and go to the Microsoft account 'Services & subscriptions' page.
Log in using the exact email address and password that was originally used to purchase or initially activate your Office software.
Scroll through your list of active services and subscriptions until you find your specific version of Microsoft Office or Microsoft 365.
Click the 'Install' button next to your Office product. This will download the setup file. Run the downloaded file to install Office on your new device.
Recover a Forgotten Microsoft Account
Use this method if you know you purchased Office but cannot remember which email address is linked to the digital license.
Locate Keys for Volume or Perpetual Licenses
Certain editions like Office Professional Plus, Visio, or Project obtained via the Workplace Discount Program still require a 25-character product key.
Try WPS Office: A Free, Hassle-Free Alternative to Microsoft Office
Tired of dealing with lost product keys, activation errors, and expensive software? WPS Office offers a free, lightweight, and powerful alternative to Microsoft Office. It requires no complex activation keys to get started and provides a highly familiar interface for a seamless transition.
- 1. Download WPS Office: Visit the official WPS website and download the free installer for your specific operating system.
- 2. Install the software: Run the setup file. The installation is exceptionally quick and takes only a few minutes to complete.
- 3. Open and edit seamlessly: Launch WPS Office and immediately start opening or creating Microsoft Office-compatible files without ever entering a product key.
Frequently Asked Questions
Can I install my single-license Office on a second computer?
Standard one-time purchase licenses (like Office Home & Student) can generally only be installed on one computer at a time. To install it on a new device, you must first uninstall it from the old one, then activate it on the new device via your Microsoft account.
What if my Office product key says it is already in use?
If you receive an 'already in use' error, it means the product key was previously redeemed and permanently linked to a Microsoft account. You cannot reuse the key; instead, you must sign in with that specific linked Microsoft account to reinstall the software.
Do I need a product key to reinstall Microsoft 365?
No. Microsoft 365 is a subscription service linked entirely to your Microsoft account. You do not need a product key. Simply log in to the Services & subscriptions page on your new device and click Install.
Is WPS Office a good alternative if I lose my Microsoft Office access?
Yes, WPS Office is an excellent, free alternative. It inherently supports all major Microsoft formats (Word, Excel, PowerPoint) and can be used immediately without searching for lost product keys, making it a perfect fallback or permanent replacement.
