You will probably need to re-flash his BIOS. It may be possible to reset them to defaults with a jumper on the mobo. In either case you need to find out EXACTLY what ...
You can install OptiFine for free by downloading it from the official website, opening the file, and then launching ...
To find your graphics card: Look for a section called Display adapters and click the arrow next to it. You'll see your GPU listed there. If you want more details, right-click the GPU name and click ...