24 Nov 2008 News for NTIA/ITS HF Propagation Models (WINDOWS version) 24 Nov 2008 1. The new installer I was recently using seems to have trouble with Windows Vista. Thus, I have abandoned it and gone back to the older installer until I can resolve the problem. I have successfully installed the software on a Windows Vista system. Please let me know if you encounter any problems. The symptoms were that on Windows Vista, it would only install the two new news files. On Windows XP, everything was fine. Go figure!