If software-based recovery is not possible, you may need to perform a physical reset:
TVT DVR password reset software is a specialized tool designed to help users regain access to their DVR systems when the password has been forgotten or lost. This software typically works by creating a special reset disk or USB drive that, when inserted into the DVR, allows the user to reset the password. Tvt Dvr Password Reset Software Fixed
Insert the reset tool into the DVR and power on the system. The DVR should boot from the reset tool, bypassing the normal login screen. If software-based recovery is not possible, you may