Once you have downloaded the executable file (usually ending in .exe ), follow these steps:

Download CPU-Z (free). Look under the tab. The "Chipset" field will tell you exactly what graphics core is present (e.g., P35, G33, 945G).

You can find the specific driver needed by checking your hardware in Windows: Intel Core 2 Duo E6550 Specs | TechPowerUp CPU Database

A: No. Intel never made a "CPU driver." You need the chipset driver (G33/G31).

Intel officially stopped supporting GMA 3100 after Windows 8. On Windows 10, you can force-install the Windows 7 driver, but you will likely experience:

Use in Safe Mode to remove any remnants of old GPU drivers. This prevents conflicts.