Server 2012 R2, fully patched.
When removing the server role "Remote Desktop Services", everything goes smoothly.
Upon rebooting, however, the server reports that it is unable to make changes to Features, and changes are being rolled back.
Server will then reboot again, and when it comes back up, RDS is fully reinstalled.
Server is also a DC and Hyper-V host. (Previous vendor installed everything on bare metal, rather than in VMs, and now I get to fix it! yay!)
Any ideas? Event logs are singularly unhelpful in tracking down the cause of this problem.