Obtain a digital certificate and create a digital signature. This article explains how you can get or create a digital signature for use in Office documents. To learn more about how to use them in Office documents, see Add or remove a digital signature in Office files.

The Certutil command-line tool can be used to display the certificates that have been issued by a certification authority using the -view parameter. Under some circumstances, Certutil may not display all the expected certificates.

A site's certificate allows Internet Explorer to establish a secure connection with the site. Certificate errors occur when there's a problem with a certificate or a web server's use of the certificate. Internet Explorer helps keep your information more secure by warning about certificate errors.

Release version 1606 of System Center Configuration Manager Current Branch contains many changes that are intended to prevent issues and improve features. The "Issues that are fixed" list is not inclusive of all changes but instead captures what our product development team believes is most relevant to our broad customer base.

In a Configuration Manager environment that is not using Microsoft Intune, errors that resemble the following may be repeated in the certmgr.log file: Failed to process notification file certmgr.box\23_{siteserver_name}.CMN (0x87d20003)

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

This article describes the issues that are fixed and functionality that is updated in Cumulative Update 4 (CU4) for Microsoft System Center 2012 Configuration Manager Service Pack 2 (SP2) and System Center 2012 Configuration Manager R2 Service Pack 1 (SP1). This update applies to both releases.

Signing certificate and certificate authority. Signing certificate To create a digital signature, you need a signing certificate, which proves identity. When you send a digitally-signed macro or document, you also send your certificate and public key.

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. This article will help you troubleshoot and fix common activation errors in Windows. For help finding your product key, see Find your Windows product key.

Credential Manager lets you view and delete your saved credentials for signing in to websites, connected applications, and networks. To open Credential Manager, type credential manager in the search box on the taskbar and select Credential Manager Control panel.