Activate Windows - Microsoft Support
When you buy a refurbished device running Windows 10, you'll need to activate Windows using the product key on the Certificate of Authenticity (COA) that's attached to your device. If your original hardware manufacturer (OEM) changed the motherboard for you, your PC should reactivate automatically.
Product keys for Windows - Microsoft Support
A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow. Windows 11 and Windows 10 : In most cases, Windows 11 and Windows 10 activates automatically using a digital license and doesn’t require you to enter a product key.
Find your Windows product key - Microsoft Support
Find your product key in the confirmation email you received after buying Windows 10 or Windows 11 in a digital locker accessible through the retailer’s website.
Upgrade to Windows 10 Pro - Microsoft Support
Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.
Upgrade Windows Home to Windows Pro - Microsoft Support
Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.
Reactivating Windows after a hardware change - Microsoft Support
If you don't have a product key or digital license, you can purchase a Windows 10 digital license after installation finishes. Follow these steps to make a purchase: Select the Start button, then select Settings > Update & Security > Activation .
Windows 10 editions for education customers - Microsoft Support
Existing devices running Windows 10 Pro, currently activated with the original OEM digital product key and purchased with discounted K-12 academic licenses through OEM partners (these discounted licenses are sometimes referred to as National Academic or Shape the Future), will upgrade automatically to Windows 10 Pro Education as part of the ...
Download, install, or reinstall Microsoft 365, Office 2024, or Office ...
Go to office.com/setup and sign in with an existing or new Microsoft account and then enter your product key to redeem it*. Redeeming your key is what adds your Microsoft 365 or Office license to your Microsoft account, and you only have to do this once per product key.
Find and install your Microsoft downloads from Microsoft Store ...
To buy an app or game, visit Microsoft Store online, on Windows and Xbox. If you bought your Microsoft software from a third-party website, you'll need to get download and product key info from them. For more info about a Microsoft 365 subscription, see Manage your Microsoft 365 subscription purchased through a third party .
How to activate Windows 10 Pro for Workstations and Windows …
You can only enter a new product key by going to Settings > Update & Security > Activation and selecting Change product key. Command line tools like slmgr.vbs won’t allow a product key from either of these two editions to be injected into Windows.