If you are performing a clean install, install drivers in this specific order to ensure the special "VAIO" buttons and hotkeys work:
The Sony Vaio Pcg 81212m is a popular laptop model that was released several years ago. While it may not be the latest model, it still has a significant user base, and many users continue to use it for their daily needs. However, with the passage of time, the operating system and drivers may become outdated, leading to compatibility issues and performance problems. Sony Vaio Pcg 81212m Windows7 Drivers Download