Microsoft has just updated the following KB Article:
Remote Control fails with error C000012 in System Center 2012 Configuration Manager
Symptoms:
When attempting to using System Center 2012 Configuration Manager to Remote Control a system, the connection fails. The Remote Control log and CmRcService.log indicate the following failure:
“WT_CompleteIO failed. Network shutdown : Unknown error (Error: C0000120; Source: Unknown)”
Full details at:
https://support.microsoft.com/en-us/kb/2716965