Did you create that second "system reserved" partition of 100MB yourself? Only one such "system reserved" partition is actually needed ever, no matter how many bootable OS partitions you might have on this drive and/or any other drive. It is the one-and-only ACTIVE partition on the first boot drive in the BIOS boot sequence list in your machine that defines where "boot manager" is placed, and it is in the one on the very left of your picture. That's also where the "boot menu" would go, if you had multiple bootable OS systems to choose from. And it's also the partition marked ACTIVE, so that the BIOS can find it on the drive among multiple partitions... in order to start the boot process by launching boot manager.
Also, you posted the graphical part from the lower portion of the DISKMGMT.MSC presentation, but it's in the upper portion where the text description of each partition is shown. This has more detail that would be helpful to us, so really both upper and lower parts of the presentation need to be seen... ideally in a large or full-screen window.
Also, if you could spread the columns in the upper portion, so that all the text in each cell is visible, there's data there that really needs to be seen.
Anyway, have you decided simply to forego your Win8 experiment, and now just want to return that previously carved out space back to your primary existing C-partition where Win7 lives? Very easy... using
Partition Wizard. You can install it to run under Windows, and you can also download/burn the ISO to standalone bootable CD. Very intuitive and you should be able to immediately figure its GUI and out how to use it once you install it.
Not all operations on C (e.g. resizing, merging, moving, etc.) can be completed while Windows is operating. But you can start the program, build the "queue of operations to be performed", and then push the APPLY button. This will prompt you to OK the restart of the system, when the boot-time component of Partition Wizard will then kick in to complete the operations on C before continuing on to perform the rest of the Windows boot process.
Or, you can accomplish operations on C while booted to the standalone CD All operations available while under Windows are also available while booted to this standalone CD, but you can do everything here at one time.
Given your picture, it seems you want to DELETE both of those two partitions to the right of the system C partition. Just right-click on each one in Partition Wizard, and select "delete". The GUI will redraw to show the total now unallocated space previously occupied by those two partitions.
Then right-click on the C-partition, and select "move/resize" to do it manually, or "extend" to do it even simpler, either of which will allow you to absorb the now unallocated freespace into C.
All of these consecutive operations are "queued up" by Partition Wizard, only to be applied when you finally are done and satisfied with your "script" and push the APPLY button. Otherwise, you can UNDO any operation, or cancel the whole sequence and start over or just abort the project.
When you finally do push APPLY, it will either immediately happen if you're booted to the standalone CD, or will prompt you for the re-boot if you are running under Windows and have specified some operations that affect C in a way that cannot be completed right now... and thus triggers the re-boot to complete the script. Either way, those two partitions will be vaporized as partitions and simply absorbed back into the C-partition to their left, which then will have conceptually been resized back to use up the whole drive (which is from where you originally started, from your description).
Partition Wizard is VERY highly recommended here.
