Hi,
I guess you are facing the problemin isntallation any AIR application. Can you please answer the below questions to help us assist you better?
1. Is there any old AIR runtime installed on your system ? If yes, please tell me its version. To check, go to Applications ->Uititlies -> Adobe AIR Application installer -> Press space bar -> Check the version number
2. Which application your are trying to install ? If you can share the applcaition it will help us in reproducing the issue and assisting you better. If possible, Can you please mail me the sample application at [bhal] [@] [adobe] [.] [com]
Regards
Varun Bhal