I tried to install recent update for SQL server 2012 and I cannot:
SQLServer2012-KB2716442-x64 failing during installation, both Windows Update and manual setup.
The last entry in log before rollback is following:
10/10/2012 19:07:04.981 Attempting to run user requested action from media ScenarioEngine.exe
10/10/2012 19:07:04.981 Attempting to launch process d:\3a871c25ddff78ec44f571\x64\ScenarioEngine.exe
10/10/2012 19:11:15.917 Process returned exit code: 0x858C001E
10/10/2012 19:11:15.917 Media ScenarioEngine.exe returned exit code: 0x858C001E