Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

There are a few common scenarios in which Windows running on a PC might be discovered to be non-genuine during validation. Repairs. If your PC has been repaired, you might start to see messages on your desktop that Windows isn't genuine.

Use the Xbox Accessories app to configure your controller or headset for your preferred gaming experience.

Note: Before selecting New, consider selecting the check box for "Prompt a profile to be used."If this is enabled, you will get a prompt every time you start Outlook to pick which profile you want to open. This is helpful when you have multiple profiles and need to switch between them.

Optimizations for windowed games improves gaming on your PC by using a new presentation model for DirectX 10 and DirectX 11 games that appear in a window or in a borderless window.

Get the most out of your subscription with expert advice and support from small business advisors. Business Assist for Microsoft 365 is designed for small businesses to give you and your employees around-the-clock access to small business advisors as you grow your business, from onboarding to everyday use.

了解如何安装 Windows 7 Service Pack 1 (SP1)。 包含有关如何获取下载、要求和其他内容的信息。

The following new and improved features have been implemented in Windows Installer 4.5. Multiple package transactionIn a multiple package transaction, you can create a single transaction from multiple packages.

The info on this page applies to the following devices: Surface Book 3, Surface Book 2, Surface Book, Surface Go 4, Surface Go 3, Surface Go 2, Surface Go, Surface Laptop SE, Surface Laptop Studio 2, Surface Laptop Studio, Surface Laptop Go 3, Surface Laptop Go 2, Surface Laptop Go, Surface Laptop (7th Edition) Surface Laptop 6 for Business, Surface Laptop 5, Surface Laptop 4, Surface Laptop 3 ...

What is a Microsoft account used for? You need a Microsoft account to sign in to your Windows pc, Xbox console, or any of Microsoft’s products and services, including Office, Outlook.com, OneDrive, Xbox Live, Microsoft 365, Family Safety, Skype, Bing, Microsoft Store and MSN.