Windows 7: Windows 7 & Dynamic Disks

I decided to play around with dynamic disks to see if there are any benefits (everything that I've discovered so far, indicates there aren't any).

I created a Windows 7 32 bit VM (using VMware Workstation).
I then installed a few programs (Firefox, CCleaner & Winamp).
I used the Disk Management tool to convert the basic disk to a dynamic one.



The VM refuses to boot (A black screen with an unblinking underline character appears)!
VMware Workstation is causing a constant 25% CPU load, but no progress occurs.

Is there a way to fix this?
What step(s) did I fail to implement?