To Change / Set a Password
Login to Windows 10 with active password.
Login via Remote desktop connection or VNC player
1. Click the Start button at the bottom left of your screen.
2. Click Settings from the list to the left.
3. Select Accounts.
4. Select Sign-in options from the menu.
5. Click on Change under Change your account password.
Important note: Please don't try to change Windows 10 user password from billing portal or vps panel. This option doesn't work for Windows 10.
Always change password with above steps. If you did this by mistake then login to server via VNC player to set new password for active user.