asked Rashik Hasnat on Stack Overflow website I've tried a solution found by google search saying to run sfc/scannow command in command prompt but didn't get any result. When I click the Debug button, Visual Studio 2015 gives me a message – Unhandled exception at 0x00007FF8EF646430 (ntdll.dll) in mmc.exe: RangeChecks instrumentation code detected an out of range array access. But when I try to add certificate, an error message is coming with the header Microsoft Management Console has stopped working. My Microsoft Management Console Has Stopped Working I'm trying to add snap into Microsoft Management Console in Windows 10. What to Do When Microsoft Management Console Stopped Working.My Microsoft Management Console Has Stopped Working.