Fortres 101 4.1 allows local users to bypass Fortres by pressing the Windows and "F" key together for 30 seconds, which opens multiple windows and eventually causes explorer.exe to crash, which then opens an unrestricted explorer.exe.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10807
http://www.securityfocus.com/bid/6332
http://securitytracker.com/id?1005766
http://archives.neohapsis.com/archives/ntbugtraq/2002-q4/0093.html