So I have had this issue since May, since then I have restored my computer twice but this has not resolved my issue. I was hoping upgrading to Windows 10 would solve my issue but it continues to persist. I am using the Surface Pro 1 and until recently I was using my Microsoft account to log into my Surface, but if I went to the account setting it was telling me I needed to verify my account by entering my account password. I did this and then I would get a error, I have misplaced the exact error code but after googling the error it seems like it was some Microsoft account login error (who would have thought???). After upgrading to Windows 10 I continued to have the same issue so I switched to a local account hoping that switching back to a Microsoft account from a local account would fix it and now I can't even switch back to a Microsoft account. When I enter all my credentials in the login window correct or incorrect the window just disappears and nothing happens.... I have spent the last two days researching this issue and can't find a single solution. I have checked to make sure my account with Microsoft was up to date and correct and it seems to be fine because I can log into my account on the website. This might not be related but I am having a similar issue with google chrome at the moment. None of my passwords are saving in the browser and every time I close the browser I need to log back into my chrome account. Can't help but feel like these issues are closely related but I could be wrong.