MMC Host Controller.exe is part of a product called known as Media Card Reader Driver for Windows 8.1 and the developer is Lenovo Group Limited .
If you think that this file contains a virus or another malware, please download a virus scanner.
If MMC Host Controller.exe is using too much CPU or too much memory in your system, it is possible that your file has been infected with a virus. Installing an antivirus is recommended.
Not all processes can be uninstalled without the help of a 3rd party tool, especially malware. To see if it can be uninstalled, first go to Start > Control Panel > Add/Remove programs and select Media Card Reader Driver for Windows 8.1 from the list to remove the process MMC Host Controller.exe from your computer.
If you have any problems with MMC Host Controller.exe, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting Lenovo Group Limited, the developer of MMC Host Controller.exe and ask for more information.