Handy little unit, this.
If you have some rogue thread under the svchost process and want to isolate it.
Find out what is using up all the disk I/O and making that workstation run like a dog.
Search for a filename that is reportedly locked and identify the process that has it locked.
Replace your Task Manager with something that has a truckload of extra features.
Take a look on the MS Virtual Academy http://www.microsoftvirtualacademy.com/training-courses/utilizing-sysinternals-tools-for-it-pros