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.

I know which version I want. How do I install it? The 64-bit version of Microsoft 365 is automatically installed unless you explicitly select the 32-bit version before beginning the installation process.. To install either the 32 or 64-bit version of Microsoft 365, Office 2021, or Office 2019, follow the steps in Install Office on a PC.

Office または Microsoft 365 を購入したときにプロダクト キーが付属していた場合は、使用している製品に対応する以下の Web サイトのいずれかにプロダクト キーを入力します。

マルウェアを削除しようとしている場合は、「Windows セキュリティで保護された状態を維持する」を参照して、スキャンを実行する方法を確認してください。 別のウイルス対策ソフトウェア プログラムを使用している場合は、そのプログラムのウイルス対策オプションを確認してください。

Windows 10 Pro offers more advanced security and business networking features, including: BitLocker Drive Encryption

Use the People page to create, view, and edit contacts, contact lists, and groups. Create new contacts from scratch, or add someone as a contact from their profile card.

Add an interactive checklist. Checklist is a feature that allows you to insert an interactive list in Word for Web. You can check and uncheck the checklist and keep track of the tasks that you are performing.

In the search box on the taskbar, type Create a restore point, and select it from the list of results.

Learn how to join a Microsoft Teams meeting if you don't have an account. Join a Teams meeting as a guest in the Windows app or on the web.

Use date and time functions to create formulas that return serial numbers, display a specific date or time, or that calculate the difference between dates or times.