C:\Program Files (x86)\Radmin Viewer 3\
A: Check if you have both Server and Viewer installed on the same machine. Each component requires its own license file. Additionally, verify that the file is not blocked by Windows Defender SmartScreen (right-click → Properties → Unblock).
Always check the release notes or contact sales before upgrading.
Radmin operates on a licensing model. You must purchase a license for every remote computer (Server) you wish to control. Radmin: Reliable Remote Desktop Software for IT Pros
If a disgruntled employee copies the radmin.lic from a server to their home PC, they could run an unlicensed Radmin Server. However, Famatech hashes the hardware ID during connection, so moving the file alone is insufficient without also copying the registry key at HKLM\SOFTWARE\Radmin\ .
When the Radmin Server or Viewer application launches, it looks for this file in specific directories. If the file is missing, corrupted, or mismatched, the software reverts to "Trial Mode" (typically 30 days) or "Free Mode" (limited to a single connection).
The process involves generating a request file on the target computer and exchanging it for a license file via the activation server. Open Radmin Server settings on the remote computer.