Assuming you have found a file that matches the search criteria, here is the standard installation procedure.
Because the compressed version often strips down textures, the requirements are lower than the official specs. download top the elder scrolls v skyrim highly compressed
Official Skyrim SE Requirements:
"Top Highly Compressed" Low-Spec Requirements: Assuming you have found a file that matches
Note: The game will run, but Whiterun will look like a muddy painting. You have been warned. "Top Highly Compressed" Low-Spec Requirements:
If you decide to go with an official source:
Warning: Due to the crack, your AV will likely delete steam_api.dll or SkyrimSE.exe.