This happens if a component has the INVISIBLE attribute. steps to reproduce: 1) run nsinstall.exe 2) copy TEMP files into a different dir 3) from this different dir, modify config.ini in the [Component3] section (aim) the Attributes= key from SELECTED to SELECTED|INVISIBLE. 4) save file and run setup.exe 5) navigate to the Custom option and randomly click on the checkboxes in the list box. 6) Crash should happen here.

Sean, while trying to verify this morning, I crashed when using the scroll bar to view all the options. I could select/deselect any of the options but once my mouse hit the scroll bar to view other options outside window, I could crash at will.

Sean, this is working on build 1999101908 on a Win98 machine. I will change resolution and then verify

Updating component from Install Wizard to Installer