When I worked at a pharmacy doing IT work, they purchased some desktops from HP with a multi year on site support deal. One day we had a computer's Hard Drive die so we called them up to fix it, which they did... and nothing more. I asked them about putting Windows back on it (as the restore partition was nowhere to be found) and the guy said "not our department."

I ended up torrenting an HP restore ISO and thankfully the BIOS's licensing key matched the ISO.