If your Windows 10 Device Manager displays a yellow exclamation mark next to under "Other devices," your system is missing its core hardware security processor driver. This controller is a physical component built directly into your AMD or Intel processor . It manages cryptographic tasks like BitLocker drive encryption , secure boot environments, and hardware-accelerated processing.
When Windows 10 displays a "Code 28" error (drivers not installed) for this device, it usually means the generic chipset drivers provided by Windows aren't sufficient. Without the manufacturer-specific driver, your system cannot communicate with these security features, which may lead to instability or the inability to use certain security tools. How to Fix the Missing Driver Issue 1. Identify Your Hardware ID pci encryption decryption controller driver windows 10
On many modern systems, particularly those with , this controller is part of the AMD Platform Security Processor (PSP) . It works alongside features like: If your Windows 10 Device Manager displays a