10 Look for Tweakui (Microsoft Powertoys). They have an option for changing te dektop start up screen.
2)--If it is an XP and you have the system CD, do the following.
Put the CD in the drive.
From RUN type in 'sfc/ scannow'
This without the speech marks and remember to put the space between sfc/ and scannow.
3)-- If you CD is out of date, download AUTOSTREAMER, follow the prompts and it will create a new XP CD with all updates you have on your system to your harddrive. All you have to do then is to use an ISO burner (like Nero) to create your new CD.