Scfilter Cid87d25e32ac0d4ef0b1e0502c6b7dfb77

Data within the ATR that provides information about the card's manufacturer and capabilities.

If the card uses a generic profile supported by Microsoft's cloud library, you can force an online query directly through system tools:

While these identifiers typically operate invisibly in the background, they often surface when a system encounter errors. For instance, if a user sees a "Smart Card" entry in the Device Manager with a yellow exclamation mark, the hardware ID will often display the scfilter\cid... string. This usually indicates that while the system has successfully identified the card using its unique CID, it cannot find a matching driver to communicate with it. scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77

These long, seemingly random identifiers are typically part of content filtering, analytics, or email tracking systems. Let’s break down what this specific token could represent and why it matters for your online privacy and troubleshooting.

This ID is documented by Microsoft as part of the Windows Embedded 8 Standard (Standard 8) module catalog, specifically under the INF-scunknown module, which provides drivers for smart cards that are not immediately recognized by the system. Data within the ATR that provides information about

Often, the driver installation fails simply because the underlying Windows services responsible for fetching smart card minidrivers are turned off or set to manual. You can fix this through the command line:

To help narrow down the issue, are you experiencing with this card, or are you just trying to clear the error flag in Device Manager? Share public link string

: Refers directly to the Smart Card Filter Driver subsystem operating within kernel space ( %WinDir%\System32\DRIVERS\scfilter.sys ).

The string scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77 refers to a specific hardware identifier generated by the Smart Card PnP Class Filter Driver scfilter.sys ) in Windows.