How to extend volume between two other volumes?

As shown in the attached, the user has ended up with his C: drive between two "system" drives, and there is a lot of unused space available.  I need to know how I can make the C: drive larger, using a method in his Windows 7 Pro, or 3rd party tools.  TIA
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Joe Winograd, Fellow&MVEDeveloperCommented:
I've been using the free home version of Partition Wizard for many years:

It is an excellent product and can do what you want. You didn't say if the user's W7 is 32-bit or 64-bit, but it doesn't matter — it supports both (also supports 32-bit and 64-bit XP, Vista, and W8). Regards, Joe
David Johnson, CD, MVPOwnerCommented:
different expert different opinion
I have used Partition Magic never with any failure
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Windows 7

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