In this case you will need uninstall the XTU and then install "KMDF 1.11 update for Win7" at the following link Download Kernel-Mode Driver Framework version 1.11 update for Windows 7, and Windows Server 2008 R2 from Official Micros…, once install go a head and install the XTU.
Let me know your finding.
I have been running the Intel® Extreme Tuning Utility (126.96.36.199) on Intel® Desktop Board DQ77KB and Intel® Desktop Board DQ77CP and it has been working, by now there might be an issue from your end.
Have you tried reinstalling the OS? It could be an issue with Windows registry.
Could you please send us a snapshot of the error you get when running the XTU?
I also have this problem. I found the following in one of the logs. However the file does exist at D:\ProgramData... C:\ProgramData is a hard link to D:\ProgramData. Apparently IETU is sensitive to the underlying link which it should not be. I don't know if this explains the benchmark failure, but it must be related in some way.
2016/02/06-14:59:57.3029|INFO] Loading Application Persistence settings from file C:\ProgramData\Intel\Intel Extreme Tuning Utility\PerformanceSettings.sdf with hardware key of "Intel(R) Xeon(R) CPU X3470 @ 2.93GHz"
2016/02/06-14:59:57.3969|!ERR] Exception opening database: C:\ProgramData\Intel\Intel Extreme Tuning Utility\PerformanceSettings.sdf
2016/02/06-14:59:57.3969|!ERR] The database file cannot be found. Check the path to the database. [ Data Source = C:\ProgramData\Intel\Intel Extreme Tuning Utility\PerformanceSettings.sdf ]
2016/02/06-14:59:58.1609|!ERR] Failed to load persisted platform setting values
2016/02/06-14:59:58.1659|!ERR] System.InvalidOperationException: Sequence contains no elements
at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
at IronCity.XtuApplication.ApplicationPersistenceDevice.LoadPlatformSettings(String settingsDatabase, String hardwareKey, List`1& bootValues)
The Intel® Extreme Tuning Utility (Intel® XTU) works with extreme processors only. I recommend you to uninstall and delete the current version from your computer and install it again using the file from the link below;