For this chipset G45/G43, it have reached the end of support life, for that reason there will be no windows 10 driver. You can try with the latest one in our website, please check.
I also have a problem with this graphics card. I have a 27" display (ViewSonic VX2739WM) but after upgrading to Windows 10, the card sends the display as though it's a 28" screen. Is there any way that this can be resolved?
Unfortunately there are no drivers available for Windows 10 using the G45/G43 chipsets.
You can see the supported operating systems here:
Intel will not provide future software updates to support new operating systems or improve compatibility with third-party devices and software products.