So, are you among those guys and gals who updated from Windows 7 or 8 to Windows 10?
For Windows 7 or 8.1 you could use this driver version so installs drivers for the Nvdia GTX 750 and Nvidia Quadro NVS 290:
Why is having 2 graphics from nVidia running on Windows 8.1 X64 being an issue? Because for some reason Windows assigns the same driver to both graphics cards , when I had an ATI card as primary card, both had their separated drivers and no issues!
If you need any more help or have any questions feel free to email me and I will answer you! :)
For Windows 10 we need a new driver of course. Here, I found that the driver package 341.74 works! Despite not listing Quadro cards as supported, it does contain drivers for them as well.
However you cannot go any driver version higher than that.