I do not have a cd player on my laptop and purchased the lightroom 4 a while back, I would like it on this laptop, I tried the serial number and it says it is invalid...what should I do. I already uploaded the trail for 30 days.
Are you sure the serial number is for Lightroom 4? How do you know?
Are you sure you downloaded the trial for Lightroom 4? How do you know? If you launch the trial and select Help->About Adobe Photoshop Lightroom, what version is shown there?