Download Lightroom 5.7 Download

https://community.adobe.com/t5/download-install-discussions/older-versions-pre-2020/td-p/13065324

IF/When you do have a download, be sure to copy it to AT LEAST one external device
-since Adobe does sometimes remove old versions from the server
-a usb flash drive or external hard drive, or write to a DVD
-plus a text file containing your serial number if you have a serial number program