"We can't sign into your account. This problem can often be fixed by signing out of your account and then signing back in. If you don't sign out now, any files you create or changes you make will be lost." This video will help you repair the above error message upon startup. This method I will show you will fix on any PC Laptop Desktop Tablet with Microsoft 10 or 8, 8.1 on it such as Lenovo Dell HP Toshiba Acer Alienware Microsoft Surface Asus Sony Vaio Samsung etc.