Mindstorms 2.0 can't download to NXT brick with error 142023
I believe that you need to run the Mindstorms Education program in Compatability mode.

The easiest way to do this is to:


Right click on the Mindstorms shortcut on either your start menu or desktop and select "Properties".
Switch to the "Compatability" tab.
Check the "Run in Compatability mode", and from the drop down that is then enabled select "Windows XP (Service Pack 3)".
Ok out of the dialog.


That should solve your problem.