HI:
Welcome! To LQ
You may want to think about shrinking your Windows 7 partition before installing Linux Mint.
http://www.sevenforums.com/tutorials...me-shrink.html
Before I installed Fedora I had to shrink my Windows 7 partition because the Fedora Installation CD
told me that there wasn't enough room on the HDD. Not those exact words but close-
HTH