Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

PC で実行している Windows オペレーティング システムのバージョンとデバイスの仕様を確認する方法をご覧ください。

Erfahren Sie, wie Sie die App „PC-Integritätsprüfung“ verwenden, um die Leistung Ihres Geräts zu verbessern.

You can refer to the contents of cells in another workbook by creating an external reference formula. An external reference (also called a link) is a reference to a cell or range on a worksheet in another Excel workbook, or a reference to a defined name in another workbook.

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled.

See how to arrange all your open windows using the mouse, keyboard, or the Snap Assist feature in Windows.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

Learn how to track shipping and pending orders from Microsoft Store. You can use account.microsoft.com to track orders from Microsoft Store.

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.