I have a program (ISYS) that I have been using since 2006. It migrated successfully to Windows 7. Just yesterday it started manifesting this strange behavior. The program has a selector to allow you to select a directory that might have relevant files for the program. As of yesterday the program will only let me select folders on the C drive. For example I have a folder on D that I need to access with this program - from the GUI when I select the D drive the directory list does not load, instead it churns away using 17% of the CPU cycles. I have let it run for an hour several times.

I have found that I can get the directory I want by using a batch file to start the program but this limits my ability to do certain things I really need to use the GUI.

I did a number of reboots and other tests - I disconnected drives but once I try to select some directory on a drive other than C it churns away.

I have experimented quite a bit and am convinced (which means I am wrong) that this has something to do with some setting change on my computer that I can't figure out as I don't see any updates.

Since ISYS has not been updated I feel confident it is something internal. Any suggestions would be appreciated.