Snagged this from my PC yesterday (Ctrl+S*). On Windows 8 Pro if you press the Start key and simply type Resource Monitor, by the time you get out Res you should have it filtered down enough to see it at the top of the search results. Click on it or press the Enter key.
The executable is resmon.exe
I keep Resource Monitor up from time to time. Typically if I see a performance issue, such as a lag or just a complete freeze when I can’t do anything.
Here’s a screenshot of Resource Monitor, pinned to my task bar.
Note how the CPU Resources for LiveComm.exe and Win8keys.exe. Both apps are (codename) Metro, now referred to as Modern applications. These are the apps that are the original built-in tiles. But not all tiles are to Modern apps. Microsoft Office apps on Windows 8 Professional on Intel or AMD (as opposed to RT which is targeting the ARM processor).
Basically, Windows 8 suspends these apps when I’m in Desktop mode.