Find answers to frequently asked questions about Office 2021 and Office LTSC for Windows and Mac on the official support page.

Firewall & network protection in Windows Security lets you view the status of Microsoft Defender Firewall and see what networks your device is connected to.

Learn how the Photos app for Windows lets you view photos and videos from your PC alongside those from OneDrive, and keeps them organized by date, album, or folder.

You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

Do you need some help installing Quick Assist? For the best experience, download and install the new version of the Quick Assist app from Microsoft Store. If you have problems installing Quick Assist, here are some steps to try to get it installed and working properly.

忘れた場合や紛失した場合に Windows パスワードを変更またはリセットする方法について説明します。

Si vous ne parvenez pas à vous connecter à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN, ou si vous ne savez pas comment vous connecter ou vous déconnecter, voici quelques solutions.

Before you begin filling out the form. The steps below will help guide you when filling out the account recovery form. It can be a lengthy process as it's designed to ask questions about your account that only you can answer.

Get help with using mail, calendar, and contacts on Outlook.com.