If your device has newer firmware (V3.3.0+), the "Helper" tool likely will not work. Instead, you should use official Hikvision methods: Releases · bp2008/HikPasswordHelper - GitHub
If you are using an older version (e.g., 1.0.0.3 or 1.0.0.4) and experiencing failures, upgrading to 1.1.0.1 is highly recommended. Hikvision Password Reset Helper 1.1.0.1 Download
Downloading from "Hikvision-Tools.com," "ResetHelperFree.net," or any pop-up that asks you to complete a survey, enter credit card details, or disable your antivirus entirely. If your device has newer firmware (V3