Support for Microsoft Product Activation problems

Help and support for Microsoft Product Activation. Links to Windows and Office product activation, how to find, replace, and change a product key.

Key resources

Key resources

What is Microsoft Product Activation (MPA)?
Learn how product activation works.

How to tell if your product is properly licensed
Make sure that you have the right licensing for your Microsoft products.

Learn how to identify, locate, or replace a Product Key
Help with finding or replacing your Product Key required for Product Activation.

Locate your Product Key sticker and learn its importance.
See examples of Certificate of Authority (COA) labels.

Activating Microsoft games and mapping programs
Frequently asked questions about Games for Windows, MapPoint, and Streets and Trips activation.

What is the difference between Product Activation and Product Registration?
You must activate your Microsoft product but you are not required to register your product, learn more about the differences.

Report Software Piracy
Reporting suspected violations of privacy when you encounter them can have a positive impact on the fight against piracy.


Microsoft Windows product activation

Activating Windows 7
How to activate Windows 7. Play video to learn more.

Windows 7 activation FAQ
Frequently asked questions about activating Windows 7.

Activating Windows Vista
How to activate Windows Vista.

Activating Windows XP
How to activate Windows XP.

How to change or update your Product key
Steps to change your product key in Windows 7, Windows Vista and Windows XP.

"Your activation period has expired" error message in Windows Vista
Provides steps to resolve Windows Activation or Windows Genuine Advantage issues when your computer is in reduced functionality mode.

Reduced functionality mode in Windows Vista
Describes the behaviors you can expect when Windows Vista is in reduced functionality mode.

Visit the Microsoft Community community
Find answers to install, upgrade, and activate Windows 7.


Microsoft Office product activation

Office 2010 Product Key Guided Help
Use our guided help workflow to solve common problems with product activation and product keys. Common problems include identifying and entering your product key; errors when entering your product key and eligibility to get a replacement key.

Description of the Office Activation Wizard
Office includes an Activation Wizard. To fully use Office, you must activate Office.

Activate your Microsoft Office 2010 programs
How to activate Microsoft Office 2010 programs and verify that your software has been activated.

How to obtain a new product key for a Microsoft Office product
How to find the product key if you cannot locate it, or how to obtain a new product key if the product key label is damaged or is missing.

Which button do I click to activate, purchase, download, or use an Office 2010 product?
This article helps you start using a Microsoft Office 2010 product if you have already bought Office 2010 and need to activate the product, want to buy Office 2010 or want to use Office Starter 2010.

Activate your Microsoft Office 2007 programs
How to activate Microsoft Office 2007 programs and verify that your software has been activated.

Resources to help you activate a license in Microsoft Office 2007 and Office 2003 programs
Troubleshooting help and additional information about activation.

Visit the Microsoft Community community
Find answers on installing, upgrading, and activating Microsoft Office.

Volume license activation

Volume license activation

Volume Activation Information for Windows Vista, Windows Server 2008, Windows Server 2008 R2 and Windows 7
View resources about Volume Licensing and Volume Activation 2.0.

Volume License Product Keys
How to get Volume License Keys including KMS and MAK.

Volume License Key frequently asked questions
Answers to frequently asked questions about Volume License Keys.


Call us


Telephone numbers for Microsoft Product Activation Centers are not listed because there are many regional Product Activation Centers worldwide. The article How to contact a Microsoft Product Activation Center explains how to obtain the appropriate telephone number by running the Product Activation Wizard.

E-mail us


Microsoft does not offer support via e-mail for Product Activation.

Chat with us


Microsoft does not offer support via chat for Product Activation.

Ask the community

Contact your computer manufacturer

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Last Review : December 18, 2014