Can't update because of mpc running in background

I downloaded the 2.15.0.18 update release for windows, but cannot run the installer. There is a mpc.exe application running in the background (suspended), but I cannot end the process (it says access is denied). Any tips on how to close the program?

As administrator : force kill the process
if still access denied, try out administrator shell :

wmic process where "name='mpc.exe'" delete

pay attention of the quoting here.