Quote Originally Posted by CGM View Post
OK, maybe it's something else.

My understanding is that a system disk usually means a disk that contains a limited number of "boot files". Typically the system disk is always the c drive. The many thousands of files that make up the Vista operating system can be on the c-drive, or any other hard drive, but the boot files have to be on the c-drive. Of course the term system disk may have a different meaning to the people who developed this software.

You know, I can't think of any reason why software would want to be installed on a non system disk. Lots of people these days have only have one hard drive, and only one partition on that hard drive. That ios the c-drive. D-drive and 3-drive would be used for CDROM, or DVD. Unless things are different with Vista, I never bothered to learn about that.

I suggest if you are concerned, see if the software company has a tech support department, and ask them to explain in writing exactly why their program wants to go on a non-system disk. Based on everything I've learned up to and including Windows XP, it really doesn't make a lot of sense.
Thanks for the help..

I just went ahead and installed it on my external HD.