Hi Kawaljit,
Hope you're doing well.
Here are the steps for you reference:
- Open cmd as an administrator and the input the following commands:
(1) diskpart
(2) list disk
(3) select disk 0 (select disk C)
(4) list partition
(5) select partition 2 (select recovery partition)
(6) delete partition override
- And then try to extend C volume.
Important: It is best to do a BMR backup or checkpoint, snapshot before doing operations.
Hope my answer can help you.
Best regards