Windows Security Not Recognizing Inserted CAC

Log on as the local administrator. Go to Start, Run, type in: services.msc, Verify that both ActivClient middleware and SmartCard services are stopped. (Windows 8 users hover your mouse in the lower right corner of your screen to get the Charms bar to show up. Click Search, type in "regedit.exe" then click it with your mouse.)

From the Search programs and files (Windows 8 and newer): type: Regedit

Navigate to "HKLM\Software\Microsoft\Cryptography" Right click on the Calais folder then choose "Permissions".

Verify "LOCAL SERVICE" exists, if it doesn't, click "ADD"

In the large white box type "LOCAL SERVICE" IF your computer is part of a domain, you will need to add your computer name\ before "LOCAL SERVICE"

Click Check Names, then OK.

Select Local Service -> Click Advanced (button) -> in the Permissions (tab) select LOCAL SERVICE -> and click Edit. (Windows 8.1 & 11 users will need to click "Show advanced permissions" to see these).

Mark the following with Allow:

Query Value

Set Value

Create Subkey

Enumerate Subkeys

Notify

Delete

Read Control

Click OK

Close all open windows

Open Services.msc again, Start smart Card Service, Start ActivClient middleware Service.

CAC Reader "should" now be showing in ActivClient.

No, it is definitely the Update. My AVD (Remote Desktop App) was working fine with my CAC reader and card till the update. Now during what should be a login process involving a pop up asking what I want to use to authenticate (then I select my CAC reader), pin, and then login. Now it just breezes right thru never presenting a pop up for CAC selection or for asking for a pin. Just strait to no certificates were found.

Then you can select another way to log in, as soon as you select smart card, it repeats the above process.

I had a similar problem with the Windows 11 update on 20 Oct 2024. The device manager says the CAC readers are installed and up to date and recognizes them. However, my CAC card and certificates will not read. The green light on the SCR3310v2 does not light up with the card is in it. I've installed brand new drivers and tried just about everything. I also deactivated memory integrity and vulnerable driver blocklist, but I see no change. I know the CAC readers are working because I bought two brand new ones and tested on another computer. Both the SCR3310v2 and the SCR3500 are new and work, but will not read on my computer. I think it is something in the Windows 11 update that is causing this issue. Please help.

I suggest you do the following:

1. Remove your CAC from the reader.
2. Visit the Internet options located in the control panel.
3. Click the content tab.

4.. Click Clear SSL state.

5. Click certificates.
6. As a backup measure export all the certs found under Personal.
7. Remove all the certs found under Personal and close the window.
8. Place your CAC back in the reader.
9. Go back and check the Personal certificates area and they should be back.
10. Launch your web browser and try to visit sites requiring a CAC.

Same issue, really hoping to see a microsoft rep jump in.