I read this twice trying to see what computer, OS and more but given only what you supplied it sounds as if the video driver is no more.
As there is no OS, make and model the GENERIC FIX I USE IS:
1. Install the motheboard driver package.
2. Install the video card driver package.
3. Install DX again
As to Unity, never used it.
Hello, about 2 weeks ago my monitor stopped reading signals from my computer due to some RAM being dirty, so I cleaned off the RAM sticks (and the rest of the computer guts with a compressed air pump) and put the RAM back in, after I hooked it all up again I turned it one and it worked like a charm. Until I tried to play Rome: Total War.
It gives me a message saying that I need directx 9 (This game and all the others worked fine the day before) so I downloaded the directx 9 from microsoft (the official one that everyone links you too) and checked the directx diagnosis tool, it read that I indeed have direcx 9. So I try to play again, same problem.
I also noticed on my web browser (chrome) that when I scroll, it's choppy-ish. It doesn't load slow, it loads like a fast wave moves across the screen and in its wake is the screen after I scrolled, and above the "wave" is the old view I was scrolling from.
Now, at this point I was thinking "maybe it's just because I moved the RAM around and it'll settle down in a bit"
I tried playing KSP, didn't even open the game
I tried playing 3-D browser games using the Unity Plugin, it says my directx or graphics driver has a problem
I try just regular 2-D broswer games, they work, but not if they start getting too memory heavy.
At this point I don't even know what to do. I have a very limited budget so I'd rather not pay $100 for geek squad to tell me I forgot to plug something in.
Also, It says I have a new hardware "Video Controller (VGA compatible)" under "Other Devices" in my device manager. I try to reinstall/update it and I get an error saying I don't have the software.
I just want to know what is wrong with my computer. Thanks in advance