I have been using MPS2011 for some time and have sometimes had the issue where it just logs into the SRCshell account spanned over all the monitors. To fix this I used to go into the user settings and set it back to requiring Ctrl-Alt-Del at logon then switch it to normal mode in MPS manager.
Unfortunately MPS2012 seems to be way more unreliable and this fix no longer works so every two weeks I seem to have to reinstall the piece of junk again. I have looked through the event logs which reveal nothing about MPS and have tried the log collector which is really good at generating a whole stack of content but no good at pointing out what might be a problem. Is there anyone at Microsoft that knows how this stuff works and could point me in the right direction as the next reinstall is back to 2011 and will signal my giving up on the platform.
The machine in question has six locally connected monitors and works great for about two weeks before if drops out to WMSShell never to return to Normal mode.