Erfahren Sie, wie Sie einen Windows-Product Key für die Aktivierung finden und wann Sie stattdessen eine digitale Lizenz verwenden.

When you initially setup your Windows device, you might have opted to use a local account instead of a Microsoft account. The main difference between a local account and a Microsoft account is that a local account is specific to one device, while a Microsoft account can be used across multiple devices and Microsoft services.

Create a SmartArt graphic to quickly and easily make a visual representation of your information. You can choose from among many different layouts, to effectively communicate your message or ideas.

Want to add a padlock to your email messages? You can use S/MIME in Outlook on the web to increase the security of messages. A digitally encrypted message can only be opened by recipients who have the correct key.

Know which environment you're in Power Query is well-integrated into the Excel user interface, especially when you import data, work with connections, and edit Pivot Tables, Excel tables, and named ranges. To avoid confusion, it’s important to know which environment you are currently in, Excel or Power Query, at any point in time.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Create a simple formula to multiply and divide in an Excel spreadsheet. You can multiply two or more numbers in one cell or multiply and divide numbers using cell references. All formulas in Excel begin with an equal sign (=).

Use PowerPoint Designer to create stunning slides with professional layouts and tips. Learn how to access and apply this feature in Microsoft 365.

How to change your Outlook signature or add a signature. Whether it’s a new job title (congratulations!) or a phone number change, make sure you keep your email message signature up-to-date.