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?

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?

We downloaded latest drivers, removed and reinstalled the driver, tried different USB ports. It shows up as working properly in Device Mgr but that's it. The light won't come on, it ignores the reader. Help.

* Changed to a question

I have fixed this issue in the dumbest way possible.

I went to Device Manager, then under Smart Card readers, I right-clicked the card reader, then uninstalled the driver (uninstall device).

Rebooted my computer. Works. I hate it.

fake edit: my guess is Windows thinks they're the world's savior and are doing the smart card reader "in-house" and any middleware even made by the vendor is seen as a foreign process getting in the way of glorious MS's in-house process for smart card reading and its delivery.

I am Having the same issues discussed in this thread. i have tried everything and the reader is still not pulling certs from the CAC.

I have two of these SCR3500 card readers, and both became inoperable after installing Microsoft's 24H2 Windows 11 release. Device Manager indicated that the driver was functioning correctly and the device was operational, but the readers would not read the CAC card—consistent with what others have reported.

The only resolution I found, regardless of any changes to core isolation settings or anything else, was to roll back the 24H2 release. This rollback seemed to be the only effective fix at the time.

However, here's where things get confusing. While dealing with this issue, I rebuilt another laptop and reset it to factory settings (Windows 10). During the patching process, it upgraded to Windows 11, including the 24H2 release. I decided to test my two SCR3500 readers on this machine, and surprisingly, they worked without issue.

This leads me to wonder if a patch or update for the 24H2 release has since resolved the card reader problems. Has anyone else checked for updates or installed anything recently to address this issue? I'm curious if others have seen similar results or have insights into this strange inconsistency. Reason I ask, is i wonder if its safe now to re-install the 24H2 on my original laptop?

Microsoft have probably corrected issue between first availability of upgrade (november) and begin of December.

@JHTN give an answer for how to resolve issue :

-Run Regedit.exe:

• Go to the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Calais

-Check the permissions for LOCAL SERVICE (if not there, add it). Make it "Full Control":

• Right-click on the key (Calais) and select "Permissions..." from the pop-up menu

• Click on LOCAL SERVICE to select it

• Allow "Full Control"

-Reboot computer