This little hack save you time installing Windows on computers. By pushing the process in priority of tasks. Installation time can be reduced so that you can use your resources for something else. Unfortunately it doesn't work quite well with Windows 10 upgrade. But that doesn't mean that you can't help to speed up some processes.
Tips Shift + F10
at the command prompt type taskmgr
and go to process and on the setup.exe program
change the level to make it priority.