When i open device manager i am getting exclamation mark on pci device and down below that same with sm bus controller,pci encryption and decryption controller kindly help me i have flashed windows 3 times latest,installed all the montherboard drivers,gpu drivers. Download the latest drivers for your TOSHIBA SATELLITE C55-A. Keep your computer up to date. Driver needed - PCI Encryption/Decryption Controller 01:33 PM Running the file on this system gave me a 'operating system is not suppported' message. PCI ENCRYPTION/DECRYPTIO CONTROLLER WINDOWS 8.1. PCI EncryptionDecryption Controller Driver software for Acer Aspire v11 Touch v3-112p-p197. PCI Encryption/Decryption Controller and SM Bus Controller. December 18th, 2016. Pci encryption controller. August 15th, 2015.