I found this information, and I think it is really important despite how easy is that..
You can open your windows CMD and run some useful commands, but some of these commands unable to run under default user account. It has to be run in administrative mode, and it is quite easy :
just type CMD in run window or in start menu search box and then hit " CTRL+SHFT+ENTER "
Also another way to do that :
type cmd in start menu search box, right click on it and select run as administrator.
But be aware of what you doing - it is admin mode :) -.