I have the partition that I want to extend onto "Unallocated" (in Windows 7 the color-code indicator above is black). The volume that I want to extend is formatted correctly (NTFS) as indicated by the official Microsoft directions. The volume that I want to extend on was originally named "RECOVERY" and is ~10GB. When I right click the volume I want to extend, the "Extend Volume" option is not clickable. I have tried reformatting the "RECOVERY" partition in several different manners, to no avail. Help?
Are you trying to extend a partition where your system files are located? I've tried this a little while back (reducing the size of my data partition to make room for programs) but to no avail. I believe I read somewhere that you can't extend that particular partition with the W7 Disk Management utility. You'll likely have to look for a different piece of software (e.g. Partition Magic) to do that.