As you're not able to see the installed preset in Lightroom, could you please let us know from where have you downloaded the preset?
Also, please let us know which version of Lightroom are you using & on which operating system?
Can I say something? I have windows 10 home, I use the presets on the latest version of lightroom classic. Here is a link to one of the presets that are seen in the new lightroom CC. I have a lot of these prests. They are not visible in the new lightroom
I´m using Lightroom 6. I bought mine from vsco :-/
VSCO used to come with an installer, I assume you ran the installer?
If it's a folder of presets, go to Preferences (Edit menu on PC, Lightroom menu on Mac), choose the Presets tab, then click Show Lightroom Presets folder. Open the Develop presets folder. Drag the folder of presets you got into it-make sure they're in a folder inside Develop Presets.