How to hide computer account in your computer ?

1. Open Start menu then click on RUN.
2. Type "Regedit" press enter
3. Windows Registry editor will open then navigate from the left panel and go to:
HKLM\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon\SpecialAccounts\UserList
4. Create a new DWORD
5. setting its name to the name of the accountyou wish to
hide.
6. Then set its value to "0" to hide it.
Now your account is hidden!!!
This account isn't completely hidden because it is visible to administrators in Local User andGroups and also the profile is visible in the Documents and Settings.
To Login after you have hidden the account
1. At Welcome screen, and you want to login to this account.
2. Press Ctrl+Alt+Deletetwice (Onlydelete is twice)
3. It will display the log-on promt.
3. Type the username, and the password and hit enter.