What exact version of LR are you trying to install?
If it is really LR Version # 1, which was released about 10 years ago, Adobe more than likely shut down the activation servers for that version.
And I seriously doubt Version one would even install on a new computer running either Windows 10 or OS X 10.11.x El Capitan.
Lightroom versions 2 through 5, and I am pretty sure this was equally true of version 1, did not require online activation (à la Photoshop), only a valid registration key to unlock it for usage beyond the trial period. Your number could be listed and saved in your Adobe account, but this was more of a service than a requirement for activation.
verified with adobe help online (which was useless) that I have version 1. When I first installed, it worked in the trial mode.
Thanks for you reply.
This is more than likely an incompatibility with the operating system you are trying to install on. AFAIK, LR 1 doesn't work correctly on any of the current flavors of windows and Mac OS X.