Windows 10 issue with mscms.dll

Hello Paul,
I apologize for the inconvenience  caused.
May I know which AVG program installed on your system?
May I know whether this issue caused by AVG program? as this issue is seems to be related to Windows Operating system.
Please feel free to get back to us for any issues with AVG.
Thank you.

mscms.dll is not designed to run on windows or it contains and error. Also the file is there in the System 32 folder. However, windows in inactive and it won't allow me to activate it. Is anyone else having this issue, and how did you correct it?

Hello Paul,
I apologize for the inconvenience  caused.
May I know which AVG program installed on your system?
May I know whether this issue caused by AVG program? as this issue is seems to be related to Windows Operating system.
Please feel free to get back to us for any issues with AVG.
Thank you.

Hello Paul,
I apologize for the inconvenience  caused.
I request you to please follow the below steps to restore the changes made by AVG Performance program and check whether the issue resolved.
1. Open your AVG Performance program.
2.Click on the performance tab. AVG PC tune up will get open.
3.Click on the "Undo changes" under the "Rescue center" tab.
4.Select all in that list and restore it.
Please feel free to get back to us for further assistance.
Thank you.

In fact its AVG Performance Pro, my trouble seemed to start after a scan and when I corrected the recommendations.

AVG Performance is installed