>A customer reports that when he starts my application (.exe) Windows looks for a diskette in drive A: - this is not done by my app. Rebooting did nto help. I had him reinstall the app to a new folder as a test - the same behavior persists. Reinstalling the VFP runtimes did not help. Starting from a desktop icon or directly from the .exe file produces no change. Any help appreciated.

If the app won't run or is causing a real inconvenience, you might trying using the ASSIGN or SUBST command. I've fooled a few troublesome apps in the past (looking for drives that don't exist) with that technique.