Hello Kevin,
thank you for the answer, even if i'm not a driver developer, i would try to tweek the INF file.
Windows 7 don't have any problems with more RAM but the driver does. If i purge the driver and system boots with default VGA driver the notebook works just fine excepting all the graphic and energy saving features. If i remap all system memory to the area above the 4GB boundary (bcdedit option nolowmem), Intel driver doesn't start at all and notebook boots with the default vga driver. Is it possible to ask the driver developer, if there could be a work around for this problem, at least until i find a time to reinstall all my software and windows in 64bit version.
I suppose, the system assignes the memory to HD 4600 above the 32bit area but the driver or even the Windows API can not address it. But it would be better to know (also unofficial) opinion of the intel driver developer to this problem.
The descrete video can not be used because it depends on the correctly installed onboard driver (Nvidia Optimus or so). If somebody knows how to force the Nvidia GT 750m to work without HD4600, it would be appreciated. There is no bios option to disable the onboard video.
Regards,
Gena