Loungers installing the Windows 10 Pro Technical Preview (build 9926) will discover that when setting up Windows, Microsoft requires that you sign in with a Microsoft account. There is no option to sign in with a local account. Once you’ve signed in with a Microsoft account you can immediately switch to a local account.
Maybe you’re like me and you don’t want to have a Microsoft account on your computer at all. It’s easy to get rid of it and here’s how:
1- Sign in with your Microsoft account and go to Control Panel > User Accounts > Manage another account.
By default, new user accounts in Windows 10 do not have Administrator permissions so neither will your local account. You can elevate your local account here.
2- Sign out of your Microsoft account and sign in with your local account.
Now that your local account has Administrator permissions you can use it to remove your Microsoft account. After you’ve done this, make sure to create a new local user account (without Administrator permissions) for your day-to-day computing.
3- To be extremely thorough, go to File Explorer > Local Disk (C:) > Users and you’ll see the leftover folder from your Microsoft account. You can delete this folder if you wish but you’ll probably need to change permissions on the folder so that you can delete it. Now your Microsoft account is really gone.