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.
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.
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One of the major problems with this error code is that Microsoft Office is a resource-based intensive Program.
However, here are some methods that can resolve this problem of yours.
Are you aware of the Machine Debug Manager? It is used by Microsoft Office to perform essential tasks. You shall set this service to start automatically mode. Otherwise, you may get an Error 1921 when you start it the next time.
A registry clean-up tool from our Assured Assist Team will always fix the critical issues with Office errors. We ensure to clean the corrupted registry entities and make your programs work. Otherwise, you require to use third-party tools to check for registry errors.
Overall, the registry stores the central database of all the system software information. This registry setting will make changes directly to the system program’s behavior.
Usually, the registry cleaners provided by third-party companies do not help you fully. Microsoft techs perform manual troubleshooting to fix the errors.
Finally, If you are still not able to resolve this Error Code 1921, we suggest you to chat with our assured experts. I am sure they will give you the best solutions completely. However, we give you assurance about your money and the service You can also visit our website for more information.
More details for this method at https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows