I've found this information here
http://wiki.arcadecontrols.com/wiki/Hiding_Windows:
The following will hide the dialog box that appears that the beggining of Windows startup informing you that the system is "Loading Settings".
To do this,follow these steps:
Go to, Start Menu -> Run and enter regedit
Navigate to entry:
HKEY_LOCAL_MACHINE>Software>Microsoft>Windows>CurrentVersion>Policies>SystemIf there is an entry for "DisableStatusMessages" set it to 1 (the digit one)
If there is no entry, right-mouse click the "System" word, and select New->DWORD value, and enter "DisableStatusMessages", right-mouse to edit the value of it, and enter 1 (the digit one).
But it doesn't work ?