Problem Drive C has only 8% free space

My system drive has only 323MB of free space, however there is 10.33GB of contiguous space on the same hard drive that is unallocated. The drive is labeled Dynaic in Storage SystemManager, but when I tried to Extend Volume, it said, ?Selected volume was originally on a basic disk and can not be extended.? What should I do?

I have another drive on the system with 13.25GB of free space. Should I install another OS on it, boot under the temporary OS, copy the present OS to a temporary directory, reformat what is now my boot drive, and then copy the existing OS back? or is there a simpler way. The workstation is connected to a Fast Ethernet LAN.

How can a drive be labeled Dynamic when you can?t expand its partition?