Default Sign In Account for Windows 10

In this case, Windows 10 might not remember the last login account, so it would default to a specific account, where there are more than 1 windows login account.

NetPlWiz is the solution:

1. run netplwiz
2. check User Must Enter a Username/Password ...
3. select the default account and hit Apply.
4. Uncheck User Must Enter a Username/Password ...
5. Apply again.
6. Done.