Caching files on network?

I recently upgraded a few laptops here from Win7 to Win10.

Our DMS stores documents in a "\\share\folder" structure.

Within each of those \folder directories there are 100s of thousands of .pdfs

On the Win10 laptops, when they go to access a .pdf contained in one of those shares, it takes FOREVER to open (this did not and does not happen on Win7 machines). Subsequent openings of that same .pdf are quick and normal.

This slowness occurs both accessing the pdf through the DMS software or just opening the pdf directly via the UNC path itself.

Would Adobe be attempting to cache the other documents in that folder before opening the .pdf actually requested? We had a similar problem years ago on a different DMS when all our documents were stored as .tifs. The .tif viewing program was trying to cache all the other .tifs in the same folder to allow for quick/easier "next" and "previous" button use. This feels like almost the exact same thing.