Multiple IDE install with Galileo

I installed the IDE for Arduino boards and it works well. Later I installed the Galileo version on the the same Windows 7 machine but when I update the driver it says the driver is already the most current. I had the same result on an old XP box and a Windows 7 laptop with both installed.

I googled and found no relevant results. I searched and found posts here for multiple versions of the Arduino board IDE but no mention of coexistence with Galileo.

Is Windows confused about the two drivers or has anyone installed both successfully?

FYI, I was able to use both versions on a Debian system.

Yes all it is doing is reporting that the driver is already installed. Is it failing to run? I have multiple versions of the IDE installed on my Mac with no problems.