Black Screen Problem

[Jtracy]

I now have a problem with a black screen. I saw an earlier post about this issue and that it may have something to do with a missing dll file. Where would this file be so I could determine if this was the issue. Also I have placed exceptions in my anti virus software to exclude the TDS folder as well as the Garmin folder. Is there anything else I need to do? Needless to say I have re-installed this software several times now in an attempt to figure this out.