That is how you reset the root password on Linux. If you have physical access to any computer, then you can do what you like. If you need to recover administrator on a Windows box then you go in with a systemrescue CD and edit the SAM database.
The choice is yours. You can deploy disc encryption, BIOS passwords etc but be prepared for being locked out.
The choice is yours. You can deploy disc encryption, BIOS passwords etc but be prepared for being locked out.