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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.

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After you Install MSXML4 (Windows 7 comes with MSXML4 SP3 with a patch that does not work for ArcGIS) there needs to be some regedit tweaks

See the End of this ESRI thread which shows this successfully concluded.

Note: Before you make any changes to the registry BACK IT UP first.

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