Installation media, such as a USB flash drive, can be used to install a new copy of Windows, perform a clean installation of Windows, or reinstall Windows. To create installation media, go to the software download website, where step-by-step instructions can be found.

Help for admins of small businesses. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

在 Microsoft Teams (免费版) 中，可以轻松地在 Teams 个人版上与联系人开始群组聊天。. 创建群组聊天后，请详细了解不同的功能，以充分利用聊天。. 点击屏幕底部附近的 “新建聊天 ”。. 在搜索字段中，输入要包含在组中的人员的姓名、电话号码或电子邮件。. 还 ...

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, here are some solutions.

Make sure you have the latest updates for Windows and device drivers. 2. Restart your PC and open only the apps you need. 3. Use ReadyBoost to help improve performance. 4. Make sure the system is managing the page file size. 5. Check for low disk space and free up space.

Si no puede iniciar sesión en su cuenta de correo electrónico de Outlook.com, Hotmail, Live o MSN, o no sabe con seguridad cómo iniciar o cerrar sesión, aquí tiene algunas soluciones.

如果您需要在頻道之外，與一小群人進行較小的討論，請開始群組聊天。 您可以將您的任何朋友或同事加入群組。 在群組聊天中，任何人都可以共用專案相關檔案，以及撥打電話。

Using the new Microsoft Teams, you can now be logged into multiple work, school, and personal accounts on the Windows desktop app. Easily switch back and forth between organizations, including guest organizations. See and change your notification settings for your various accounts.

Download Microsoft Defender on your devices either by: Scanning the following QR code. Searching for Microsoft Defender in your app store. Sharing with your devices, the following link: Copy link. We encourage you to install Microsoft Defender on at least five devices per person.

Following are examples of some common nested IF (AND ()), IF (OR ()) and IF (NOT ()) statements in Excel. The AND and OR functions can support up to 255 individual conditions, but it’s not good practice to use more than a few because complex, nested formulas can get very difficult to build, test and maintain.