I resized the Windows partition using the windows shrink tool. I think I figured out what happened in my first install of Mageia...First, Windows 7 doesn't
play well with others. I've now learned (thanks to suggested reading from other posters) that GRUB shouldn't be installed in the MBR of the first hard drive (sda). Second, guess where Mageia installs GRUB (legacy) by default? Yep, the MBR of the first hard drive.
From the installation dialogue:
Using a Mageia Bootloader:
By default, Mageia writes a new GRUB (legacy) bootloader into the MBR of your first hard drive. If you already have other operating systems installed, Mageia attempts to add them to your new Mageia boot menu.
I assumed (wrongly) that if I just followed defaults along the installation highway, I would be fine. I didn't take the time to understand how different bootloaders work and play together, and I should have. If I was not dual-booting, this would not have been a problem, but I admittedly did not do my due diligence. I''m learning all the time and will continue to try to get my machine to dual-boot, but I will take my time and read, read, read before attempting an installation again. XP was much easier to dual boot, and I didn't make all the necessary adjustments for Win 7.
What I was able to use of Mageia was beautiful and functional, and really seemed to be full-featured. I'm excited about the OS, I just don't want to jump in again until I have time to really look over that bootloader issue.
Thanks to all of you for trying to help me out. I truly appreciate it!