(1) You would first create 116 MB of unallocated space using "right-click START, Disk Management", followed by "right-click C:, Shrink volume". This creates enough space for EFI (100 MB) & MSR (16 MB). Unlike AOMEI, Disk Management allows you to specify MBs (instead of GBs) in the dialog. Put 116 into the "Enter the amount of space to shrink in MB" box, then click the Shrink button....
(2) Then AOMEI Partition Assistant can slide C: rightward over the unallocated space this way...
(a) Open AOMEI Partition Assistant.
(b) Select C: partition.
(c) Click Resize/Move Partition...
(d) In the dialog that opens...
- Put a checkmark into "I need to move this partition".
- Move the cursor into C:. It will appear as four arrows joined at their base (as I have drawn).
- Drag that cursor rightward as far as it will go, then click OK.
This will move C: over the 116 MB of unallocated space. Unfortunately, you likely won't notice anything is happening because 116 MB is so small compared to the GBs of C:. Just be sure tactilely that you've dragged it all the way.
- The Apply button will light up at the top left of AOMEI. Click it & follow instructions to complete the operation which surely will involve a reboot. Or, click the Discard button to cancel it.