Problem
The login dialog on windows XP is taking an excessive amount of time when it says “Applying computer settings”
Solution
You can remedy a DNS registration issue on Windows 2000/XP/Vista/2003 computers by performing these steps:
Open a command prompt window.
Type ipconfig /flushdns and press Enter.
Type ipconfig /registerdns and press Enter.
Restart the computer to ensure that these changes take effect.
The result was a much shorter login time.