Hide other User Accounts in windows Vista and Windows 7 without any tools
Step 1 : Run type regedit
Once in regedit go to HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon
Step 2:In the left panel, right click on Winlogon and click New and click Key. Type SpecialAccounts and press Enter
Step 3:In the left panel, right click on SpecialAccounts and click New and click Key. Type UserList and press Enter.
Step 4 :In right panel of UserList, right click on a empty area and click New then click DWORD (32bit) Value.
Step 5:Type in the name of the user account that you want to hide and press Enter.eg: Everyday 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.