How to remove picture which is showing before Welcome Screen?

To remove that picture which is showing before Welcome Screen in Windows XP do next:

• Click on Star,
• Click on Run...,
• In Run window type regedit and press Enter,
• In new window find next location: HKEY_USER\.DEFAULT\Control Panel\Desktop,
• Find Wallpapers paragraph which will look something like this: ab Wallpapers REG_SZ C:\Dosument and Settings\
• Click on that paragraph and delete all in Value Data
• Click on OK and Restart your PC
  

After Restarting, screen after Welcome screen will be black like before. Value which you did delete you can save or you can change that picture on same way.