Hi,
it seems fairly straightforward to me but then I don't have the same setup as you:
"Converting Dynamic disks to Basic Disks in Windows:
Before converting the dynamic disks into basic disks in Windows, I would recommend you to create a recovery media of your operating system and move the other important files into an external hard drive. Once you are ready, you can use the following steps to convert dynamic disks to basic disks.
Step 1: Open the Run dialog box by using the hot key combination Windows Logo Key + R
Step 2: In the Run dialog box type in diskmgmt.msc and hit enter.
Step 3: Now in the Disk Management window look for the dynamic disk you want to convert into a basic disk.
Step 4: Right click on each volume of the corresponding dynamic disk and click Delete Volume for each volume on the disk.
Step 5: When you have completed deleting all the volumes, right click on those disks and select Convert to Basic Disk.".
If you want to install Windows and Linux (Ubuntu) based systems, I can really only suggest (if you can't follow the given steps above) you wipe your entire drives and first install windows and then install Zorin (Ubuntu), see the partitioning guide for more info, I don't have any more info on dynamic disks as I have never had that problem sorry!:
(Backup all your data before commencing with partitioning!).viewtopic.php?f=6&t=2601I hope it helps!.