When I right-click inside a clear area of ArcToolbox and select Environments, the Environments Setting dialogue box is blank.
The only items available are the buttons on the bottom to close, etc.
I am running Windows 7, ArcInfo with SP2 installed, MSMXL 4.0 SP3.
I have done a clean uninstall and a reinstall of ArcInfo w/SP2.
I have contaced ESRI Tech Support, but no solution yet.