1. Install Adobe Lightroom 4.
2. Open the software.
3. Copy one one of the serial key.
SERIAL KEYS
1160-4554-5361-1383-7894-3853
1160-4120-4715-7469-0173-5637
1160-4675-4483-5604-0278-9055
1160-4624-2417-9154-5142-1989
1160-4430-9531-3867-1847-0764
1160-4437-5394-1353-6629-4083
1160-4220-9002-3330-6802-7926
1160-4297-4769-5397-7994-7268
4. Skip registration page and select "no thanks" for participation.
5. Do not update the program. Updating will cause the software serial to be blacklisted.