Yes, it does.
What you should have done after the technician installed Windows was shrink the C drive, and then create a new primary partition (s) in the resultant unallocated space.
Just right-click each logical partition in turn and choose delete.
Once you've done that, highlight the unallocated space, then right-click again and follow the wizard's instructions to create a new primary (basic) partition. It'll also offer you the chance to format the new partition. Just choose the Quick Format option or you'll have to wait some time before a full format is completed. You'll also be able allocate a drive letter of your choosing.
Whatever you do, don't highlight your C drive because if you mess with that one you'll have no operating system to boot into.