you might try this,TaskInfo utility Site says current version has "expermental" win8 support.
It is a sophisticated utility that combines many of the functions of M$ TaskManager and SystemsInfo tools.
http://iarsn.com/taskinfo.html
I have been using it for over 10 years now after I learned of it from an anti-hack group. Back in the day, this would reveal processes running that could hide from TaskManager. Good for finding trojans etc.
It also has option to "close" nicely, or if that fails, to "terminate", which seems to be more effective that TaskManager's "end program now" option.