Comment by pedro_caetano

> I can almost guarantee this is from some endpoint management software your company installed.

I had the same issue with a loan machine from a client, super responsive onsite, but once I connected through a VPN from an external network, all the basic functionality in the file manager was brought to a halt. Even something as simple as right click on a folder to show a context menu would take several seconds.

The files were all local (also with Onedrive sync disabled) so I am almost positive it was whatever they were using for endpoint protection (Can't recall 100% but probably something from CrowdStrike).