This is the exact description of what I have, I have done a scan using my PCs firewall, it took all night and said 16 files were infected, however it has failed to remove the offending email. All day yesterday computer was fine til &pm, suddenly internet disrupted, when I went to Programs I find that the Microsoft edge that was downloaded on Saturday 14th May gone replaced with Microsoft Edge loaded yesterday, 16th May, this had happened last week so I uninstalled it, I did the same thing a few minutes ago and installed a fresh Microsoft Edge again, I think there is some connection between the robo email and this Microsoft Edge being downloaded. I have submitted a form to Microsoft telling them of the problem. My last resort was to think about wiping the computer but it will mean having to download some of my programmes and I do not think that unless this is a virus (which I am beginning to think it is) thatit will stop it coming in to my emails again. Microsoft need to fix this problem and investigate