Learn how to remove viruses or malware from your Windows PC. Learn how to recover a hacked or compromised account, what to do next, and how to prevent your account from being compromised in …

Go to Select device for service and follow these instructions: Sign in with your Microsoft account. Select the device that needs service, then select Next. If it isn't registered, select Register device. Follow …

To restore all features of Office, you'll need to fix the problem that's causing activation to fail. Step 1: Sign in to Office with the right account. If Office asks you to sign in, enter the account you used to …

Learn how to find your BitLocker recovery key in Windows.

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

Download and install or reinstall Office 2021, Office 2019, or Office 2016. Important: Support for Office 2016 and Office 2019 ended on October 14, 2025 and there will be no extension and no extended …

Depending on how you got your copy of Windows 11, you'll need either a digital license or a 25-character product key to activate it. Without one of these, you won't be able to activate your device. A …

Learn how to create a password reset disk for a local account in Windows 10 and Windows 11.

Jan 12, 2007 · Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working …

How you change the product key depends on your version of Office. Select your Office version from the tabs below. If you bought multiple copies of Office and used the same Install button to install Office …

Before installing Project the first time, sign in with an existing or new Microsoft Account and enter your product key* at microsoft365.com/setup. Redeeming your key links your account with the Project app …