Learn how to find out the size of your mailbox and its folders and how to compact Outlook Data Files (.pst and .ost), which might help improve performance.

Learn how to fix problems signing into your Microsoft account. Resolve password verification, locked account, and other Microsoft account login issues.

Learn more about why Microsoft 365 users can't open or view attachments in Outlook on the web. There are several ways to send and receive a blocked file.

How do I download my Microsoft account recovery code? You cannot retrieve or download an existing Microsoft account recovery code: If you can sign in, you can create a new recovery code at any time using the steps above. If you cannot sign in, use the Microsoft account sign-in helper.

Training: Learn how to use Outlook in Windows, MacOS, iOS or Android, and Outlook on the web through a series of Outlook training courses.

Learn How to use two-step verification with your Microsoft account.

Multi-factor authentication (MFA) helps you to access your accounts more securely. It's a way to prove that you are who you say you are. Because passwords can be forgotten, stolen, or compromised, MFA is an additional security step that helps protect your account by making it harder for other people to sign in to your account.

Select Start , enter device manager. Then, select Device Manager from the search results. Was this information helpful?

Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard. This security update includes quality improvements. The following summary outlines key issues addressed by the KB update after you install it. Also, included are available new features.

In some cases, pressing Windows logo Key + Ctrl + Shift + B to reset your graphics driver may fix your issue. If this does not work, see if restarting helps. If you are experiencing issues after an update, returning, or rolling back, to a previous version of your display driver may solve the issue. To roll back the driver: