Sure, that shouldn't be a problem.
First, could you please post a screenshot
of your Disk Management window? Use the snipping tool
found in the start menu.
Unfortunately, you cannot shrink volumes from the beginning, only from the end, using Disk Management. First, Shrink
the D partition in Disk Management. Then you will need to move the volume.
Use a third-party partition manager, like Partition Wizard
, and move the D partition to the end of the drive. Then you can extend the C partition.