Symptom - Windows 8 to Windows 8.1 Upgrade fails
Warnings: Microsoft technician identified the upgrade was not accepting SCSI. Microsoft error logs showed an error with the SCSI drive.
Possible Solution:
1. Backup existing VM
2. Delete all snapshots (Fusion does not allow HD type to change when there are snapshots.)
3. Settings - Change Hard Drive type from SCSI to IDE
4. Turn On VM
5. Start upgrade inside Windows 8
6. Select keep files, applications, settings