How to Fix Error Code 1921? Basically, when you try to install or update Microsoft Office returns you with this Error code 1921. Many users reported that they encountered this Error message “ERROR 1921: Service ‘MDM’. In this scenario, verify if you have sufficient admin privileges to stop the system services. Error 1921 is a general problem for the Windows system. It will stop you from being able to install “Microsoft Office” and different programs on your computer. It has a debugging feature which is known as “Microsoft Debug Manager” which controls and fixes the error codes.
Have you learned the reasons for system update failure? There are several reasons behind the generation of this error code 1921. However, this error code particularly arises during the installation process of Office programs. Mostly, the duplicate programs flip the outlook signatures when you open different editions in spite of the first one. We recommend you check for duplicate programs as well. we suggest you to chat with our assured experts One of the major problems with this error code is that Microsoft Office is a resourcebased intensive Program. 1. Firstly, click on Start > Run > Type “MMC” in the box and click OK