A Windows product key is a 25-character code used to activate Windows. It looks like this: 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.

Select your version of Microsoft 365 below to learn how to activate Microsoft 365. Activate Microsoft 365 or a non-subscription version of Office. Activate Office that's pre-installed on a new Windows device. Activate an Office purchase or offer that's included on a new Windows device.

You suspect your device has been infected. Use installation media to reinstall Windows 11. Select one of the recovery options below and follow the steps to try to get things working again. If you've recently installed a Windows update, uninstall the update to try to resolve the issue.

To find downloads on your PC: Under Quick access, select Downloads. Note: If necessary, go to the View tab, select Navigation pane, and ensure that Navigation pane is checked. You can also find your Downloads folder under This PC. Learn how to find where your browser is saving downloads.

If a Microsoft 365 application such as Word or Excel isn’t working correctly, sometimes restarting it will fix the problem. If that doesn’t work, you can try repairing it. When you’re done, you might need to restart your computer. The steps to access the repair tool vary depending on your operating system.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

SharePoint is a browser-based app that you connect to through your web browser, like so: Go to office.com, and sign in to your work or school account. In the upper left corner of the window, select the app launcher > All apps > SharePoint.

You can set up an authenticator app to send a notification to your mobile device or to send you a verification code as your security verification method. You aren't required to use the Microsoft Authenticator app, and you can select a different app during the set up process.

Chat or receive a call back from a technical support expert: If you have a Microsoft 365 Basic, Microsoft 365 Personal, or Microsoft 365 Family subscription, get questions answered from anywhere via chat or request to receive a call back from one of our technical support experts.