When I open up 2 macro-enabled workbooks(*.xlsm) simultaneously (highlight 2 *.xlsm files in windows explorer and hit enter), both files open but when I go to the VBA editor only one is displayed.

If I then select file not displayed in the VBA editor and try and open the VBA editor(Alt/F11), a 2nd VBA editor is opened.

What's weird is that when I try this on another very similar model computer, it works normally (both files are displayed in VBA editor)

To get the bad computer to work properly, I need to open 1 file first, then open the second and then both are displayed in VBA editor.

Ideas?

Thanks
Jeff