C:\Users\Computer\Pictures\Drive Partitions.png – look like picture image file only.
You have two partitions, one is (C:) and the other look like a recovery partition (D:)
Do not delete these 2 partitions.
(C:) is your main partition.
Recovery (D:) is a special partition on the hard drive used to restore the system in the event of problem. Recovery (D:) drive can be seen in Windows Explorer as a usable drive, you should not attempt to alter in any way, as this can cause the system recovery process to fail.
This PC have three partitions on one disk.
Maybe you can take a screenshot and post the image, if you have a problem.