Depending on your product and if it's still in support, Microsoft support experts are available to help you with a broad selection of support options and able to address product and service challenges for a more personalized experience.

How to use the IF function (combined with the AND, OR, and NOT functions) in Excel to make logical comparisons between given values.

Get the steps for changing your home page in Microsoft Edge, Internet Explorer 11, Google Chrome, Firefox, and Safari.

Learn how to troubleshoot Bluetooth problems in Windows. Resolve issues connecting a Bluetooth device or accessory.

如果你正在使用 Windows 电脑，并且想要在电脑设备上显示来自其他屏幕的应用程序和内容，则需考虑将设备屏幕镜像或投影到电脑。 请注意，需要支持 Miracast 的设备。 下面介绍如何将另一个屏幕或项目镜像到你的电脑。 了解如何将内容从一台设备屏幕镜像或投影到另一台设备。

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

Learn how to connect a Bluetooth device in Windows and adjust Bluetooth pairing settings.

Fresh Start in Windows 10 lets you perform a clean reinstallation and update of Windows while keeping your personal data and most Windows settings intact.

Learn how to check if your PC is capable of running TPM 2.0 or how to enable TPM 2.0 to upgrade to Windows 11.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.