Office 小型企业版、Office 家庭和学生版以及 Office 专业版可在单台计算机上安装。 如果尝试在另一台（自己所有的或其他人所有的）计算机，或者硬件更改后的同一台计算机上安装和激活这些版本的 Office，则可能会看到一条错误消息，提示你已达到最大激活数量。

Learn how to change your account picture in Windows. Choose from pictures on your PC or take a new selfie.

How to uninstall Office automatically. After you restart your computer, the uninstall tool automatically re-opens to complete the final step of the uninstall process.

How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

Improve your writing skills with Word's tools for spelling, grammar, and clarity. Find out how to check and correct errors in your documents.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

Learn how to format text, add graphics, and more in Word documents. Create professional-looking documents with ease using our step-by-step guide. Try it now!

L'app Microsoft Authenticator ti consente di accedere ai tuoi account quando usi la verifica in due passaggi.

Find out how Microsoft uses activity history data to provide personalized cross-device experiences and to help improve its products and services.

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.