Download Adobe Lightroom 4.0 - Adobe Support Community
Hi Timothyf28995791, As you have mentioned you would like to download and install Lightroom 4 on your new machine, you may use the following link to do so: Download Photoshop Lightroom. Lightroom 4 is a pretty old software and has not been tested on any of the latest operating systems by Adobe, hence it may or may not work.