Caja, after you sadd new cities in Weather Watcher, do you see the following file?

C:\Program Files\Weather Watcher\CityCode.cmb

> No, this file is not there.
I have a friends computer (with Vista) that runs WW ok. This has the citycode file. I copied this to WW on my machine and the problem still occurs. Opening the file does contain the London United Kingdon Kingdom UKXX0085 code.
I'm sure you are on the right rack when you thought it must be something to do with the city code though as this always disapears after the first launch of a new re-instal.

Weather Watcher creates the "CityCode.cmb" or appends to it if it already exists when you add new cities in the Weather Watcher Options window. It seems that Weather Watcher does not have write access to "C:\Program Files\Weather Watcher" on your computer.

Did you disable Vista UAC?
http://disablevistauac.com

If WW can get installed to that folder why can't it write to it??? That doesn't make sense.

Perhaps the Weather Watcher installer had access to write to that location at install time.

Perhaps but WW also had the ability to create html files since the forecasts were current initially after the install. And to update the Registry, if that's where WW get's it's forecast data.

EdP, the issue seems to be permission-related. The city search feature has been working for some time now without any issues, so I doubt Weather Watcher is not attempting to write to that file. Yes, it's possible -- not likely though.

To me this implies that all WW files are present and functioning properly including the install aspect.