Hello ddevito, welcome to Seven Forums!
The only way you are going to get any usable space without destroying the factory partition structure is to use the Method Two
in this tutorial at the first link below, Windows has a 4 partition limit, I'm sure that's what got you a Dynamic disk in the first place.
You will have to extend
the C: partition back into the unallocated space first and then you will be able to proceed; I'm sure using the bootable Partition Wizard will get you a bigger shrink/resize of the C: partition, to free up more space for storage if you like, after
you have converted it to an Extended partition / Logical drive. Partition / Extended : Logical Drives
Then have a look at this one below for some ideas. System Reserved : Multi Boot from Logical Partitions
Be sure to use the Partition Wizard Bootable Disk (PWBD) and not the installed version; download the PWBD ISO file from this link and burn the ISO to CD then boot
the CD to make the changes. Partition Wizard Free Bootable CD ImgBurn Free ISO Burning Software
I've add a snip of your disk management for those that don't have access to word.
click to enlarge