|It sounds like you have a black font on a black background. |
So when you Right-Click your Desktop and when the Menu comes up you do not have a Properties item on the menu?
Also, the start button is not visible where you can just go into the control panel?
I am not quite understanding the issue.
Did you change the backgrounds using the Group Policy Editor (GPO) and it is affecting all of the workstations or are you running Terminal Server where the workstations are thin clients?
I am just having a hard time understanding how changing the background has affect all of the users.