I don't think I can change or replace this laptop's graphics card safely. Does this mean I need to play this game on a different computer?

When I have "Lightmaps" turned off, the game looks like this: When I have it on, this happens: I tried the fixes that this thread told me to do, however, all of my .NET things are up-to-date, and I even tried reinstalling the game and restarting the computer. I have a feeling the issue is...