I don't see this as a hidden tool, it's just a tool that most repair technician's and very promising individuals use in order to repair the every day common hard drive and software problems. It has always made my job easier using these commands and it will also help you diagnose a failing hard drive or software problem. When in doubt use it wisely and majority of the times it corrects the problems.
System File Checker
chkdsk C: /R
driverquery /fo CSV > drivers.csv