Thanks, I have reset the camera as you said using is button and shuting down the power. That's works perfectly now I can see the admin user name that I lost before and can access to the function create a new user to add one.
Hello,
I upgraded the original firmware of a DS-2CD2032-I that I bought a long time ago on Aliexpress using the method describe and now I can install new firmware with Internet Explorer browser or iVMS-4200 software.
All is working correctly but during the upgrade process I lost the admin user...