If you can tell me you're using or the exact error message text, I can give you a more specific fix.
Compatibility issues between the aging AutoCAD 2010 architecture and modern Windows 10 or 11 environments. Adlmint.dll Autocad 2010 64 Bit
AutoCAD 2010 was one of the first versions to offer a dedicated 64-bit installer. Ensure you aren't trying to run the 32-bit version of the software on a 64-bit OS, as the adlmint.dll file is architecture-specific. If you are migrating to a new PC, always use the 64-bit installation media to ensure the libraries match your processor's instruction set. If you can tell me you're using or
Antivirus software "quarantining" the file, mistaken for a false positive due to how it handles licensing. Adlmint.dll Autocad 2010 64 Bit