Following an upgrade of my PC from Win7 a few days ago I'm getting the System_Thread_Exception_Not_Handled IGDKMD 64.sys few times per hour. The Update&Security shows three unsuccessful updates one for Microsoft Office and two for Intel driver HDGraphics 4000 with errors numbered 0x80070002 and 0x80246007. I tried to install the HDGraphics driver several times. Last time, today following a purge of the Windows downloads folder. The System uses "Basic Display Adapter" (with a very low resolution)rather than the HDGraphics. I would be grateful for any suggestions.