Have you tamed Windows Defender and added exclusions for Media Center 32? Pretty sure once you do, this issue should go away.
Yes. These are my exclusions:
Files
C:\Windows\System32\MC32.exe
C:\Windows\SysWOW64\MC32.exe
Folders
C:\Program Files\J River
C:\Users\**my user account here**\AppData\Roaming\J River
Processes
C:\Program Files\J River\Media Center 32\MC32.exe
C:\Program Files\J River\Media Center 32\Media Center 32.exe
C:\Program Files\J River\Media Center 32\JRService.exe
C:\Program Files\J River\Media Center 32\JRWorker.exe
C:\Program Files\J River\Media Center 32\JRWeb.exe
C:\Program Files\J River\Media Center 32\PackageInstaller.exe
C:\Windows\System32\MC32.exe
C:\Windows\SysWOW64\MC32.exe