After upgrading to 10 586 all my mail programs including Gmail failed. I could enter them online but the mail applications would not work. I went back to the previous build and everything worked just fine. Did anyone else encounter this problem. I'm running an AMD 6300 series and I like Windows 10. I do not like the Windows 10 mail programs, or the Windows 10 browser, I use IE 11 or chrome if IE 11 hangs up and live mail.