Some versions of the game store activation tokens in the Windows Registry. If you have an old backup of a previously activated computer, you can manually inject those keys.
For a more permanent solution that avoids manual key entry entirely, the community has developed a . This patch removes the SecuROM requirements from the game executable, allowing it to launch without needing a key or the original disc. Common Fixes for Modern Systems James Cameron 39-s Avatar The Game Offline Activation
Open a keygen tool (typically bundled with unofficial versions of the game or found on community forums like Some versions of the game store activation tokens