A digitally encrypted message can only be opened by recipients who have the correct key. A digital signature assures recipients that the message hasn’t been tampered with. Notes: Outlook on the web requires a Windows desktop device to support S/MIME.

Describes methods to prevent users from connecting to a USB storage device that is connected to a Windows XP-based, Windows Server 2003-based, or Windows 2000-based computer.

Find and open File Explorer in Windows 10 and Windows 11, and customize Quick access by pinning and removing files and folders.

Learn how to enable virtualization through the UEFI (or BIOS) of your PC to run the Windows Subsystem for Android or Windows Subsystem for Linux.

If you’re an administrator, you can use the Office Deployment Tool to manage your Office 2016 Click-to-Run deployment options, such as installations sources, product and language combinations, or deployment configuration options.

Starting with the 2007 Microsoft Office system, Microsoft Office uses the XML-based file formats, such as .docx, .xlsx, and .pptx. These formats and file name extensions apply to Microsoft Word, Microsoft Excel, and Microsoft PowerPoint.

Windows Installer provides a standard foundation for installing and uninstalling software. Software manufacturers can create the setup of their products to use Windows Installer to help make software installation, maintenance, and uninstallation straightforward and easy.

How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.

A list of Excel training, from entry level to advanced skills, plus templates and other resources.

Emoticon keyboard shortcuts. GroupMe supports emoticon keyboard shortcuts on desktop and web. When you type :-) as well as many others, it's converted into a GroupMe emoticon. Here's a list of the emoticon keyboard shortcuts.