Same issue here. Chrome not downloading to mapped drive (I didn’t try other browsers). I uninstalled v20 (Kaspersky Internet Securiry) and installed v19. This solved it. You can download v19 here: https://products.s.kaspersky-labs.com/homeuser/kis2019/19.0.0.1088a/english-GB-0.1248.0/United%20Kingdom(en-GB)/kis19.0.0.1088aen_14170.exe