Trying to download eM client 7 free from http://www.emclient.com/download W10, Chrome Version 53.0.2785.116 m (64-bit) up-to-date. Consistently fails with Network Error after 0, 2 or 6 MB.
Also tried in Edge on W10, similar result, hung on 1%.
Succeeded by downloading on old Vista machine and copying via USB. Interestingly trying to copy over the internal network failed at a similar point.