I want to increase the size of my C drive by stealing from my D drive. The C drive was 60 gig and running out of space, the D drive was 400 gig. After reading a little bit, I used the windows 7 disk management utility to shrink D by 200, then used the bootit utility to move the data to the end of the disk so I had free space between C and D (this is what I read, and the extend option was grayed out otherwise). But extending my C drive is still not an option - it's still grayed out. What do I need to do? I've attached a screen shot of the disk management software.