When the RW.vhdx is corrupt, the user ends up with an read only profile. Manual intervention is required to remove the RW file which can't be merged into the base profile to restore R/W access to the profile.
The following error is logged in the event viewer:
"Open vDisk Failed, file:<path to RW.vhdx> (The chain of virtual hard disks is corrupted) There is a mismatch in the identifiers of the parent virtual hard disk and differencing disk."
Feature Request: Automatically remove a corrupt RW file when detected. As it can't be recovered anyway, deleting the corrupt file will at least restore functionality (R/W access to profile).