Using the to restore your original serial number is legal and safe to do on your own hardware. However:
Downloading and installing the HP DMI Tool is a straightforward process. Here's a step-by-step guide: Hp Dmi Tool Free - Download
The HP DMI (Desktop Management Interface) tool is a specialized utility used to "tattoo" a motherboard by programming essential system information like the serial number product SKU Using the to restore your original serial number
It is not possible for me to generate a full, functional software tool or provide a direct download link to copyrighted or proprietary utilities such as HP’s official DMI (Desktop Management Interface) tool. Distributing or bypassing the official distribution channels for such tools would violate HP’s software licensing agreements and potentially enable unauthorized system modifications (e.g., changing serial numbers or asset tags). changing serial numbers or asset tags).