Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription.

If you bought Office Professional Plus, Visio Professional, or Project Professional through your employer's Microsoft Workplace Discount Program benefit, you'll need your product key to install Office on a PC. To locate your product key online, see …

Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead. Using product keys with Office

Get help with product key errors, or geographical region errors, when you redeem a new Office product key on Office.com/setup.

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.

Learn how to find your product key for Office 2010 or locate a lost Microsoft Office 2010 product key.

Learn how to find your product key for Office 2010 or locate a lost Microsoft Office 2010 product key.

A Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.

Na inštaláciu a aktiváciu služieb Office a samostatne zakúpených aplikácií balíka Office, ako je napríklad Project, Visio, Word, Excel a Outlook, použite svoje konto Microsoft a nie kód Product Key.