The TOSHIBA Quad Core HD Processor driver is software that allows Windows to communicate with and properly manage a Toshiba quad-core processor in your laptop or desktop. This driver may also include power management, thermal controls, and performance optimizations. To install it, download the driver package from Toshiba's official support website, then run the installer. In most cases, Windows should automatically detect and install the correct drivers, but you can manually update them through "Device Manager" by selecting the processor's entry and choosing "Update driver." Are you facing any specific issues with processor performance?