Smartkey.dll is a Dynamic Link Library (DLL) file associated with the hardware protection dongle (security key) used by ECM Titanium.
Add the entire ECM Titanium folder to the list in settings to prevent future deletions. 3. Replace the Missing .dll File If the file is entirely gone, you may need to replace it.
: Add the entire ECM Titanium installation folder to your antivirus Exclusion List to prevent it from being deleted again. 2. Install Correct Dongle Drivers manually
: If you see a "missing smartkey.dll" error on Windows 10, it usually indicates: The security dongle is not plugged in or recognized. Antivirus software has quarantined the file.
I can help narrow down the solution to get you back to tuning.