Notes: You don't need a smartphone to receive a security code. Text messages may come from either "MSFT", a short number, or a mobile number.If you have requested a security code, you can trust the message that arrives.

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

Microsoft 365 is a subscription service that makes sure you always have the most up-to-date modern productivity tools from Microsoft. There are Microsoft 365 plans for home and personal use, as well as for small and midsized businesses, large enterprises, schools, and non-profits.

Note: If you don't see the option to Restore preinstalled apps, it means your PC doesn't have preinstalled apps configured. In versions of Windows 10 prior to version 2004 this feature was called Fresh Start and to use it you'd select Start > Settings > Update & security > Windows Defender > Device performance & health .

In the list next to Personalize your background, select Picture, Solid color, Slideshow, or Windows Spotlight (to see a new image from around the world every day).

The troubleshooter provides steps for you to follow. If a program isn't listed in the uninstall options, you'll be asked for that program's product code. To access the code, you'll need a tool for reading MSI files—which is typically available to IT professionals. You'll find the product code in the property table of the MSI file. What it fixes

If you can't download apps and games, review your linked devices then select Unlink to allow new devices to be added. Register a device to see its warranty To see the warranty coverage for your Surface, Surface accessory, Xbox, or Xbox accessory, you'll need to register its serial number.

If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.

Try these things to troubleshoot network connection issues in Windows 11. Make sure Wi-Fi is on. Select Start > Settings > Network & internet, then turn on Wi-Fi.Next, select More options (>) next to Wi-Fi, then select Show available networks.If a network you expect to see appears in the list, select it, then select Connect. Open Wi-Fi settings

Learn how to use Word in Windows with training guides, articles, and videos from Microsoft Support.