Search for "gamespy comrade.msi". If it shows up right click on it then record the drive path and enter it were it asks for it when you get the error. Did this work?
I had a problem like this sometime ago with a program. For some reason it did not uninstall correctly and left a file or two that I could not find. Because of these lost files it would not load a new version of the software. I never did get those files removed and moved on to a new program. Vista does not show drive paths but XP does.
I was unable to update or uninstall a program because of a missing file example.msi the notification i got was as follows:
The feature you are trying to use is on a network resource that is unavailable.
Click ok to try again or enter an alternate path to a folder containing the instalation package gamespy comrade.msi in the box below.
then: error 1714. The older version of gamespy comrade cannot be removed contact tech support.
I have this problem with a couple of other programs.
Trying to solve this, any help appreaciated.