I don't know how or where to download another one. I have an HP Probook 4320s . I don't know much about computers and, well, I honestly don't know how to fix it. My computer has a Intel Core i3 sticker on it, but I don't really know what to do with that. I would greatly appreciate it if someone helped me fix this.
You can got to your Original Equipment Manufacturer's web site (HP) and check for the drivers for your system.
For this you can use this URL:
Just select the operating system that you have and look for graphics driver, then download and run the latest version posted there.