Is it windows version? If so you need some tweaking prog.
You can fix it through registry as well, do the following:
1.Click on "Start", then "Run.." and type "regedit".
2.Navigate to the registry key:
"HKEY_CURRENT_USER\Control Panel\Desktop".
3.Once there, locate the DWORD
value "PaintDesktopVersion".
4.Right click on it and select Modify.
-Value equal to "0" removes Windows version from desktop.
-Value equal to "1" adds Windows version to desktop.
5.Reboot your computer.
(c)TweakXP.com