I see it when i am in computer. I see Local Disk(C:)-the 500gb, the Local Disk(F:)-the 1tb, and System Reserved(D:)
Go into Disk Management (as administrator)
Right Click on that partition.
Hopefully, you'll see "Change Drive Letter and Paths"
See if there is a Remove option.
NOTE: Tread carefully. You do not want to remove the partition, just the drive letter.