Windows Security is blocking my USB Smart Card Reader S3XXx64.sys

This was the solution that fixed it.

https://www.reddit.com/r/army/comments/1g7nggo/comment/lss24bh/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button Basically the explanation is that the driver for the smart card reader we probably all have is SUPER old and Window's Defender is blocking it because it isn't trusted.

So, in Device Manager, I just opened the failed device, clicked "uninstall" and selected the "Delete the driver" check box. then, when I unplugged and plugged back in the reader, it replaced the driver with a standard Microsoft driver.

Problem solved....although, I would also note that this driver hasn't been updated since 2006 either.... So, I guess microsoft is above their own rules.

This is a HUGE issue that Microsoft needs should address with a KB article. This is affecting Hundreds of thousands of users,

Recently experienced the same issue on multiple machines.

I was able to resolve by uninstalling my card reader app (ActivID ActivClient x64) removing all of the S3XXx64.sys drivers found in the C:/Windows/ subfolders. Then downloading and installing the latest Identiv SCR3xxx driver package (v9-02) at: https://support.identiv.com/scr3310v2/. Followed up by reinstallation of the ActivID ActivClient x64 (version 7.4.3) app.

This stopped the driver incompatibly issues i was experiencing with Core Isolation/Memory integrity enabled.

I attempted to proceed with the recommendation mentioned, without the issue being resolved. After many hours of research, the cause to this issue is from the latest Windows Update that came into my computer on 11/14/2024. There are several forums out there stating Windows in now block all card reader drivers. I attempted to uninstall the update but was unable to as Microsoft history is only allowing an uninstall of the last two updates dates for 11/21 & 12/04.

Please advise how to return to this version of windows as this is preventing me from doing my job.

Windows Version needed: 2024-10 Cumulative Update Preview for Windows 11 Version 23H2 for x64-based Systems (KB5044380)

Had the same problem with my SCR3310 CAC reader and finally figured it out. There were two drivers loaded on my computer for that reader: Driver Version 4.68 (2021) and 4.65 (2015). I deleted 4.65 and the reader started working normally again. To Delete the driver, right click on the Windows Start button/Icon, select "Terminal (Admin)", type "pnputil /delete-driver oem135.inf" and hit Enter. You should be prompted to restart the computer and it should be fixed.