nVidia GeForce4 MX 420 Go Video Driver
File name: PK-000305-00-exe.000.rar
Used on the following Sony Laptop models:
Note: These are Japanese market laptops.
Un'rar this file to a temp folder with nothing else inside the folder.
You will have 2 files, an EXE and a SJN file. Both are required to install this driver.
Launch the EXE file by double-clicking it and follow on-screen instructions.