Properties > Installed Files > Verify integrity of game files to force a reset of the activation script. Method 3: Reset Activation Limits via EA Support If you have exceeded the 5-device limit , the only official fix is to contact EA Support. EA Help Contact Page and request an "activation limit reset" Shift 2 Unleashed
To create a feature to fix these issues, here's a general approach: serial number nfs shift 2 unleashed fix