The "PCI Encryption/Decryption Controller" appearing in with a yellow exclamation mark indicates a missing or incompatible driver for a hardware security component. This is not a standard Windows driver but a vendor-specific controller. The issue is most prevalent on AMD-based systems (particularly mobile platforms and chipsets) but can also appear on enterprise-grade hardware with cryptographic accelerators.
| Vendor | Technology | Typical Driver | |--------|------------|----------------| | | Platform Security Processor (PSP) / fTPM | AMD Chipset Drivers | | Intel | PTT (Platform Trust Technology) / Crypto Accelerator | Intel Management Engine or Serial IO | | Broadcom / Cavium | Dedicated cryptographic co-processors (servers) | Vendor-specific | | Lenovo / Dell | Custom security chips | OEM system driver packs | pci encryption/decryption controller driver windows 10
It offloads cryptographic tasks (like data encryption/decryption) from the main CPU cores to specialized hardware, improving performance for features like BitLocker . | Vendor | Technology | Typical Driver |
If no cryptographic features are used (BitLocker, Windows Hello, secure boot), the device can be safely disabled: pci encryption/decryption controller driver windows 10
The most reliable solution is to download the driver directly from the laptop or motherboard manufacturer's website (e.g., Dell, HP, Lenovo, ASUS).