I have no special anti-virus. Windows Defender and Windows Firewall, that's it. I've tried Safe Mode, no luck. If I go into FireFox and try a download an attachment from gmail it just says Failed -...

I've been running WIndows 10 for a little while now, over a month. Now, for some reason I cannot download a file. If I try from Firefox, it fails, if from IE it fails and if from Edge it fails. I'm...