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

Summary. This article describes how to troubleshoot problems that may occur when you start or use Microsoft Word. Use the following methods in the order in which they are presented.

Learn about installing and adding printers in Windows. In most cases, all you have to do to set up a printer is to connect it to your PC.

Defragment your Windows 10 PC. Optimizing your drives can help your PC run smoother and boot up faster.

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

How to use the IF function (combined with the AND, OR, and NOT functions) in Excel to make logical comparisons between given values.

Find the Recycle Bin. If your desktop shows no icons at all, right-click (or press and hold) the desktop and select View.If Show desktop icons has no checkmark, click it to add one. If that doesn't work, try this:

Learn how to run a disk cleanup in Windows including deleting temporary and system files to free up disk space.

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.

Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.