A new KB (3015693) was released related to stop error on a Windows Server 2012-based RDS server (non-R2).
“…When this issue occurs, all the running Remote Desktop Protocol (RDP) sessions on the Remote Desktop Services (RDS) server stop responding, and the unsaved work on these sessions will be lost. Additionally, the Stop error message resembles the following:
STOP: 0x000000AB (parameter1 , parameter2 , parameter3 , parameter4 )
- The Stop error 0x000000AB describes the SESSION_HAS_VALID_POOL_ON_EXIT issue.
- The parameters in this Stop error message vary, depending on the configuration of the computer.
- Not all 0x000000AB Stop errors are caused by this issue…”
Source and info:http://support2.microsoft.com/kb/3015693/en-us?sd=rss&spid=16526