You can manually search for drivers by visiting the Intel Download Center . For this specific processor, you would generally look for Chipset Software rather than a CPU-specific file.
If you have already downloaded a driver file, you can install it manually: Intel® Graphics Driver for Windows* [15.40] download driver intel core 2 quad q8400
If you are using the integrated GMA 4500 graphics, drivers are often included in Windows. For manual installation, check for Legacy Graphics Drivers if you are on an older OS like Windows 7 or 8. BIOS Updates: To ensure full compatibility with the You can manually search for drivers by visiting