Windows 7 -> driver installation -> code 10

I had a similar problem with Arduino nano atm328, error 10, but i had another good one, so i decided to check it out what if i compare pins and components from good one to error one and surprise, my error 10 board had a problem with regulator AMS1117, if i test diode from pin 5V to output from regulator AMS1117 i get 1.5KOhms but in the good one board i get 0.00, it means that pin 5V to output from AMS1117 should be in short circuit.
i'll try to remove it to figure out if it's the problem.

Best wishes.

Israel M.