Auto-Tune and issues downloading large files form SharePoint Online

Some O365 clients may experience errors or disconnects or slowness with uploading/downloading large (>10MB) files from SharePoint Online. There is a workaround on client side. Need to disable Auto-Tune.
This will stay at some small % for a long time :

 Then eventually:


To fix this, from a command prompt ->
netsh int tcp set global autotuninglevel=disabled  

Shout out: http://sharepoint-community.net/profiles/blogs/o365-sharepoint-online-not-able-to-download-upload-large-file