If you do not want to purchase a digital certificate from a third-party certificate authority (CA), or if you want to digitally sign your document immediately, you can create your own digital certificate.

CVE-2022-34691, CVE-2022-26931 and CVE-2022-26923 address an elevation of privilege vulnerability that can occur when the Kerberos Key Distribution Center (KDC) is servicing a certificate-based authentication request.

The easiest way to find which Surface model you have is to use the Surface app. It shows the model name of your Surface device and each Surface accessory. Note: When signed in to the Surface app, you can see information for other Surface devices that you've also signed in to. Open the Surface app.

Windows will let you know if you need to restart your device to complete an update, and you can choose a time that works best for you to complete that update. The latest Windows update is Windows 11, version 23H2, also known as the Windows 11 2023 Update.

Sign in using Microsoft Authenticator. Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account.

You can create a new security key PIN for your security key. Open the Windows Settings app, select Accounts , select Sign-in options, select Security Key , and then select Manage. Insert your security key into the USB port or tap your NFC reader to verify your identity.

Activate Microsoft 365 or a non-subscription version of Office. When you start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365. Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365.

By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in. For example, you first enter your password and, when prompted, you also type a dynamically generated verification code provided by an authenticator app or sent to your phone.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

TPM 2.0 is used in Windows 11 for a number of features, including Windows Hello for identity protection and BitLocker for data protection. In some cases, PCs that are capable of running TPM 2.0 are not set up to do so. If you are considering upgrading to Windows 11, check to ensure TPM 2.0 is enabled on your device.