Why can I not combine two partitions into one from Disk Management?

Why can I not combine two partitions into one from Disk Management? Okay I have 3 partition, both on the same hard drive, one is OS, the other 2 are for data. I want to combine the 2 data partition into one, How can I do that?
Asked by: Guest \| Views: 357

Total answers/comments: 2

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Guest [Entry]

"Move all of the files from one of your data partitions to the other.
In disk management, delete the now-empty partition.
You should then be able to grow the remaining partition to fill the empty space.

If that doesn't work, move all the data files off the system (onto an external USB drive, for instance), delete BOTH data partitions, and create a new partition that fills the now-empty space."

Guest [Entry]

"How to Resize Partitions in Windows 7

delete (backup first!) the 2 'data' partitions, then use Extend Volume ... on drive C: and set it to the maximum availabe size.

note: backup your system before messing with partitions!"