Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Learn how to switch out of S mode to install apps from outside of the Microsoft Store or to upgrade to Windows 11.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Try these solutions if you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out.

Hotmail 现在是 Outlook.com。 了解如何登录以访问 Outlook.com、Hotmail、Live 或 MSN 电子邮件帐户。

Learn how to find which version of Windows operating system your PC is running and device specifications.

Keeping your login information secure will sometimes require you to change a password. You can easily edit the passwords saved in Microsoft Edge.

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

Learn how you can free up drive space in Windows. Keep your PC running smoothly and up to date by increasing the disk space.