A PSP Windows driver generally refers to the Processor Support Package (PSP) driver, which is a software component that allows your computer's hardware (particularly the processor or chipset) to communicate effectively with the Windows operating system. The PSP driver is essential for maintaining system stability, performance, and security features, such as power management, thermal management, and various security functionalities provided by the processor.

PSP is commonly associated with AMD processors and is often needed for proper functioning of systems using AMD hardware. It ensures that certain firmware-level functions work correctly, including security features like TPM (Trusted Platform Module), Secure Boot, and more. Without the PSP driver, some features or power management settings might not work optimally.