About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Download the latest internet browser recommended by Microsoft from the official support page.

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

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

You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs.

Discover how to earn Microsoft Rewards points through various activities and redeem them for exciting rewards.

Learn how to use Xbox cloud gaming on various devices including Android, iOS, and Windows with this comprehensive guide.

The Calculator app for Windows is a touch-friendly version of the desktop calculator in previous versions of Windows. You can open multiple calculators at the same time in resizable windows on the desktop and switch between Standard, Scientific, Graphing, Programmer, Date calculation, and Converter modes.. To get started, select the Start button, and then select Calculator in the list of apps.

Learn how to open and run DxDiag.exe on Windows to collect device information and troubleshoot DirectX sound and video issues.

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.