Hi,
If you're using a Yahoo Modified browser, these have several spyware viruses included in them especially if your Browser modifications included installation of the Yahoo Toolbar or Yahoo Search. You can check if those are installed by Right-Clicking on your W10 Start button, and left-click on the
PROGRAMS AND FEATURES box which show all apps installed on your computer. If either of those are there, you will need to remove them; but first take a look at this Post I wrote that tells you how to fix your Edge browser:
Windows 10 - cant add to favorites bar
Bottom line, is that if your other browsers are working and Edge (or IE11) is broke or both are broke; your W10 has been attacked by viruses/malware in most...