We upgraded to 24H2 and now our SCR3310 card reader is no longer recognized and we now cannot log in with our CAC card. Is there a fix?

I read all the information you all posted. I also downloaded the newest version for the SCR3310 and it worked without me having to rollback to the older version.

Thank you all for posting to help try to resolve the issues.

Do not install the Windows 11 drivers.

Go to https://support.identiv.com/scr3310v2/ and download and install the Windows 10 Device Guard compatible drivers. You'll need to unzip the file, right click on SCR3XX.inf, and select "install," or select the device in device manager, right click and select "update driver," select "browse my computer for drivers" and navigate to the folder you unzipped the drivers to.

Thank you! This fixed it for me!

so I fixed mine with multiple ways and don't know which one 100% fixes.

I went to device manger and uninstalled the CAC reader.

I grabbed the process name S3XXx64.sys from the driver error and went into the registry and deleted anything that popped up as it ( I recommend restarting the computer after, mine kind of didn't like it ).

 I also turned off memory integrity after i deleted the process from the registry. after you turn it off, I tried turning it back on, it presented me with the driver issues i needed to fix in order to re-enable the memory integrity, after registry deletion it turns back on without issues.

! be aware when turning off the memory integrity and enforced-stack protection that it might give you errors in drivers or apps to correct to re-enable. !

after all that it works fine, the rest is just certificate problems because of the new year so make sure you pick the right one when signing in.

so:

• delete all S3XXx64.sys from registry

-turn off memory integrity ( potentially optional )

-delete device from "device manager"

Hope it helps. I'm not a expert. Happy new year :)

JHTN's fix worked, thanks!

I did everything in various orders of deleting drivers, rebooting, attaching the card reader, using the Identive drivers, using MS drivers, etc. In total I spent about 3 hours troubleshooting including using a different CAC reader with the same issues. Tried this and followed the guide from: https://tech.springcard.com/2014/pcsc-troubleshooting-on-windows/

I'd definitely give this a shot for anyone else having issues since the update and not waste your time with the other attempts like I did.