It’s useful to find out what is using up your computer’s system resources  out of curiosity or when you are troubleshooting a problem. This can reveal the programs that are memory hogs or indicate when a hardware upgrade may be necessary. On Windows there is an easy way to monitor your memory, CPU, network and disk activity using the Resource Monitor.

To open the Resource Monitor:

• Open the Task Manager (Ctrl+ Shift+ Esc or right click taskbar then click Start Task Manager)
• Click on Performance tab
• Click Resource Monitor… button at the bottom of the window.

References

How to Use Resource Monitor (PC World, 2011)