The Resource Monitor in Windows 7 is a very good and easy way to help analyze performance and diagnose possible bottlenecks. With access to sections displaying process specific statistics for CPU, Memory, Disk or Network; Resource Monitor will immediately help identify which processes are hogging the most system resources.
Click on Start and type RESMON (upper or lower case, doesn’t matter) into the Start search dialogue box. Then click on the “resmon” entry:
Now click on the various tabs to display relevant statistical information for all running processes:
To help with identification of any unknown/unrecognized processes, simply right click on the process and select “Search Online”.