Hi folks today Am gonna show you a simple steps on how to Associate your microsoft account with your windows10 if you are  having difficulties in signing in, coz there are a lot of complaints related to that, and i was a victim of that bug, i spent 3weeks not been able to sign in to my microsoft account on windows10, so i cant sync my Data and also i cant download or update anything from store, after going through windows10 forum i found out bunch of complaints related to this issue. at last i figure out how to fix the problem.   there is it.
before you proceed make sure you are connected to the internet,  goto your settings>update&security>advance option. look down you will see “Get Insider Builds” Under it Click on “Get Started” new window will pop up, there you’ll see space for username and password, fill in the space with your microsoft account and password and hit sign in. after that it will open another page requesting for your old password, understand this very well, you are to input your old windows password if you have changed it, not your microsoft account password,if you haven’t changed it leave the space blank and go on.
if you follow all this steps correctly your account will be added successfully and you can now synchronize your data and download from store. hope this  helps, if you have any Question you can write it down and i will get back to you as soon as possible….