NVIDIA driver 6md647ww does not install on W701 with Windows 7 64 Bit

Question

Hello,
I have downloaded the nvidia driver 6md647ww (311.00), 64 bit version, and can't install on a Windows 7 64-bit system. It says "no compatible device found". The strange thing is, although the decompression routine and the window asking to start installation both say that they are the 64 bit version, the text besides the check mark "install the driver now" says it will install the 32 bit version (after decompressing the window says 64 bit in the upper part, but 32 bit in the lower part).
So I guess there is an error in the installation routine which erronously wants to install the 32 bit version although it is DEFINITELY the 64 bit version I have downloaded. Also, I downloaded for testing the 32 bit version of the driver (5md647ww), and if I try to install that, I get exactly the same error as with the 64 bit version.
Could someone please look into the 6md647ww, there is something wrong with it. Also, I can install 6md640ww and 6md643ww without any problems and switch between these two versions without any error - the 6md647ww issue is definitely NOT a problem of my OS configuration.
I have a sporadic heavy crash issue with 6md643ww and need to upgrade badly.
Please help. Best regards, Michael
System: Lenovo W701, 16 GB Ram, Windows 7 64 Bit, NVIDIA Quadro FX 3800M

Answer 1

In the meanwhile Rev 04 of the driver was published. This version is binary different to Rev 03 and - surprise - it now says correctly after unpacking it will install the 64-bit version. But after that same problem as before, "no compatible device found".
I did some searching into the files of 6md647ww. I guess the file Display.Driver\NVLT.inf contains a list of compatible devices - in this file the sections labelled NVIDIA_SetA_Devices.NTamd64.* list a lot of device-ids, for example PCI\VEN_10DE&DEV_0A3C&SUBSYS_214517AA and many more. The device id of the graphics card for a system can be found in the hardware/device manager of windows, I obtained that for my card and this id doesn't show anywhere in NVLT.inf. So if my guess is correct, it is no wonder the installer says "no compatible device" since the device id of my card is not listed in NVLT.inf.
Please note again that all previous versions of lenovo drivers for my NVIDIA Quadro FX 3800M did and do install without absolutely any problem!
This is strange, readme of the current driver version definitely says NVIDIA Quadro FX 3800M is supported by this driver, but the driver doesn't seem to contain the device id for it. Looks almost like the wrong driver was used / bundled into 6md647ww.
And again the question to the board / administrators if lenovo technical support is reading here and is there another contact at lenovo where I could direct my problem to? I am still having the sporadic heavy crash issue which is very dangerous since it can happen any time if displaying whatever graphics in whatever software and which therefore has a high risk of data loss. Also, installing the plain NVIDIA driver directly in the current version still has the problem of flickering and color errors, so this isn't a solution either.
Best regards, Michael