I got a new computer. How do I load Photshop Elements 11 on the new computer?

If you purchased via disk, use the disk to install a new version on the new computer. If you downloaded the software, then take the installer from your backup and use that. If you didn't back up, go to the Adobe website and download a new trial to your new computer and use your old serial number.

Then take the installer and back it up somewhere safe. You cannot rely on anyone to keep your installers safe but yourself.