Just follow the steps as given below :
Go to Start > Run > type ” regedit “.
Step 1:Once in regedit go to HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon
In the left panel, right click on Winlogon and click New and click Key.
Type SpecialAccounts and press Enter.
In the left panel, right click on SpecialAccounts and click New and click Key.
Type UserList and press Enter.
In right panel of UserList, right click on a empty area and click New then click DWORD (32bit) Value.
Type in the name of the user account that you want to hide and press Enter.eg: Account.
In the right panel, right click on the user account name and click Modify.
To hide the user account – Type 0 and click OK. (number zero not the letter)
Whenever you want to use the account just unhide the it by typing 1 instead of zero.
Posted by Shubham ;)