Basically, the program must be installed on the primary drive. To be more accurate, the program must "think and believe" it is installed on the primary drive. This is actually easy once you know how. But it's not something that one learns through osmosis. Kinda like riding a bicycle. Mapping a drive to a directory on your C: drive is easier than you may think, and doesn't require you to re-install "anything". The trick is, you have to map the "entire" drive to a directory on the C: drive. You can't just map a directory on the other hard drive.
Now you can do this with your existing Drive E: and then "put it back" when done. THe only drawback is, any programs currently installed on Drive E will not work, while you're using this for TurboTax. So do you have some other external hard drive or big enough USB flash drive we can do this with, that's got nothing on it at the moment? This is easiest if we can start with a blank, unformatted external drive, or one that you don't mind re-formatting and losing everything on.
Let me know which path you want to take here.
