Samsung Monitor Driver

I've had an ongoing problem with this for some time now. You can see here that my Device Manager tells me that I'm missing a video controller, and also in that post is my inability to watch full screen videos online. Here, I talk about the problems I've had with my display driver crashing.

Now, yesterday I downloaded Photoshop, and as it opened, a window popped up saying that my "monitor Profile" is defective and needs to be calibrated (See first attachment). If I choose to Ignore Profile, I can use Photoshop as usual, but everything I export has an irremovable yellow tinge. If I choose to Use Anyway, there is no white in Photoshop's color pallet, only the same yellowish color.

This got me thinking for the first time that my monitor was the cause of my problems, so I searched online for Samsung 2243swx drivers. On their webpage, they had up for download only one driver, which is for a VGA graphics card (See second attachment). I've been running a PCI graphics card (NVIDIA GeForce 8400 GS), and I was wondering if this could be the problem.

Would you say I ought to buy a VGA graphics card?