Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Install Office 2007. Insert your Office 2007 CD into the drive. If the setup wizard doesn’t start automatically, navigate to the CD drive and click SETUP.EXE.

Создание установочного носителя для установки или переустановки Windows 7, Windows 8.1 или Windows 10.

请执行以下任一操作： 在 “翻译为 ”下拉列表中，选择要将页面翻译成的语言。 默认值是为Microsoft Edge设置的语言。

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

Learn how to find and install digital downloads from Microsoft Store. See instructions to download and install software directly purchased from Microsoft.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Learn about what effect closing a Microsoft account might have on your other apps and services.