The keyword refers to a specific Hardware ID for a Generic Smart Card device as recognized by the Windows operating system . Specifically, it is the identifier used by the Smart Card PnP Class Filter Driver ( scfilter.sys ) to manage the communication between a smart card and its reader. Understanding SCFILTER and Smart Card IDs
: The string following "SCFILTER" is a unique ID generated from the card’s Answer to Reset (ATR) string.
: This is the "Smart Card PnP Class Filter Driver". It sits on top of the card reader driver to detect when a card is inserted and helps generate a Plug and Play (PnP) ID for that card. scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77
: This specific hex string identifies a "Generic Smart Card" often found in systems manufactured by companies like Gigabyte. Why You See This ID
You likely encountered this code because of one of the following scenarios: The keyword refers to a specific Hardware ID
: Occasionally, security scanners like Norton Power Eraser may flag scfilter.sys as a potential threat, though this is usually a false positive as it is a legitimate Microsoft system file. How to Resolve Missing Driver Errors
: A "Smart Card" appears in your Device Manager with a yellow exclamation mark because the system cannot find a specific "Minidriver" for it. : This is the "Smart Card PnP Class Filter Driver"
: Tools like DriverIdentifier or DriverPack often flag this ID when searching for missing system drivers.
