OK, maybe it's not Outlook Express, but when I installed Windows 10, I HAD to create a mail account for @outlook.com. I already have one for @comcast.net which I've used for years and my husband has one @gmail.com. All of these would show up when I clicked on the Mail icon that was added to my desktop when I installed Windows 10. I don't have any idea what version this is or if it is an old hacked version, I'm not a computer tech. I used this just day before yesterday, and now when I click on it, it won't open, nothing happens, no messages, nothing. I did find one suggestion that said go to the admin prompt command and do sfc/scannow. It did the scan and found no problems. Most of the questions I found were people who couldn't open their mail after installing Office. I did not install Office.