I am currently running the Windows 10 Pro Insider Preview 17074.1000 on my Dell laptop. I did see there is a new Insider Build as of today (January 24th), but haven't had a chance to install it yet, so do not know if this issue is resolved.
The issue I have been having is that when I download a file using Edge from Canvas (learning management system in place at many schools) I cannot open them, such as when I attempt to download a .7z archive, when I try to extract it, it says "Not an archive":
However, if I try downloading files with Google Chrome, the .7z archives extract just fine, and the Word documents open perfectly.
Is this just a problem with Canvas possibly, or Edge?