This has been done on other Vostro 430's before and I was able to get it working on a Vostro 430 running WIndows 10 before starting on the Windows 7 machine...but now it won't work!
The PC is a Dell Vostro 430 with an NVIDIA GTS 240 installed. The user wanted another display added so I chose a spare ZOTEC NVIDIA GT 610 card which has a PCIe x1 connector.
Plugged in the card and as expected the drivers weren't working (Code 43), so I uninstalled all the drivers and started fresh.
I have the install files for these two cards which were used on another Vostro 430 with the same configuration and thought it would work.
But now, no matter what order I install these drivers in, Windows is not installing the GTS 240, which is the original card it had in the first place! It is only seeing the newly added GT 610.
Unfortunately, at this point the user needed his PC back so i couldn't continue troubleshooting.
My next step was going to be to try finding an NVIDIA uninstaller software to completely clean out all drivers and then try the two driver installs which I have.
Anything else which I should check?