Tech support scams adapt and persist in 2021, per new Microsoft research. How to spot a "fake order" scam. Microsoft security help & learning. Learn how to protect your PC, identity, and data from tech support scams.

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.

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

An Incoming webhook lets external applications share content in chats and channels in Microsoft Teams. Webhooks are used as tools to track and notify. You can post to a channel or chat when a webhook request is received.

Use voice typing commands to insert punctuation marks. Use dictation to convert spoken words into text anywhere on your PC with Windows 10. Dictation uses speech recognition, which is built into Windows 10, so there's nothing you need to download and install to use it.

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.

Along with software updates for Windows 10 or Windows 11, it's important to make hardware updates, also known as updates for drivers and firmware. You can quickly check the health of your Surface drivers and firmware using the Surface app. Open the Surface app.

Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Set up Office apps and email on a mobile device. Small business help and learning. Learn how to download and install apps you need from your Microsoft 365 business subscription.

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.

Microsoft 帐户是访问 Microsoft 产品和服务所需的个人帐户。 Microsoft 帐户的用途是什么？ 你需要一个 Microsoft 帐户才能登录到 Windows 电脑、Xbox 主机或任何 Microsoft 产品和服务，包括 Office、Outlook.com、OneDrive、Xbox Live、Microsoft 365、Family Safety、Skype、必应、Microsoft Store ...