Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Learn how to contact Microsoft Store support to get help for your payment and billing issue.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

Skype help & learning Important: Update December 20th 2025: We are extending the timeframe you have to export your Skype data until June 2026. Submit your requests to download your data through the Skype Export Portal here.

Securely browse the web in Microsoft Edge With online threats getting more advanced day by day, it is important to prioritize the safety of your web browsing. Microsoft Edge offers several features and practices that can enhance your online security and protect your personal information. Follow these guidelines to browse the web securely in Microsoft Edge. Verify the connection icon in the ...

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content

有多种方法可将上标和下标应用于工作表中的文本或数字。 将文本值的格式设置为上标或下标 当你想要以具有视觉吸引力的格式呈现数据时，这很有效。 若要为数学、化学或其他类型的技术表达式设置数值或公式的格式， 请使用公式符号和模板。 选择要设置格式的单元格或单元格区域中的字符 ...

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.