Moving or Extending a UEFI disk Partition on the C drive to the Front

Steps

1. Create Unallocated Space:

• Using Diskpart: Open Command Prompt as administrator. Use diskpart, list disk, select disk # (where # is your disk number), list partition, and select partition # (where # is the partition you want to shrink). Then use shrink desired=100 (or the desired amount of space in MB) to create the unallocated space.
• Using Partition Manager: Launch the tool, select your C drive, and use the "Resize/Move" option to create unallocated space in front of it. 

2. Move the EFI Partition:

• Using Diskpart: After creating the unallocated space, use list partition again to identify the EFI partition. Select it using select partition #. Then, move it to the unallocated space using the move command.
• Using Partition Manager: Select the EFI partition and use the "Resize/Move" option. Drag the partition to the unallocated space you created.

3. Extend the C Drive:

• Using Diskpart: Select the C drive partition using select partition #. Then, use the extend size=XXX command, replacing XXX with the desired amount of space to add.
• Using Partition Manager: Select the C drive and use the "Resize/Move" option. Drag the right border of the partition to fill the remaining unallocated space.

4. Apply Changes:

• Apply all the changes you've made to the disk in both Diskpart and the partition manager.