Open Device Manager → “Smart card readers” → You should see “Z3X Smart Card Reader” or “Generic Smart Card Reader” without a yellow exclamation mark.
Windows 10 has a habit of “helpfully” replacing your working driver with a generic Microsoft one. z3x smart card driver win10 x64
On Windows 10 x64, you might encounter an error stating that the driver signature could not be verified or that Windows cannot verify the publisher. Open Device Manager → “Smart card readers” →
If this worked, you can open the Z3X Shell software, and you should see your card serial number and expiration date displayed on the main screen. If the software still says "Smart Card Not Found," proceed to the manual method below. If this worked, you can open the Z3X
Remember: always source your drivers from the official Z3X team, create system restore points before major changes, and consider a dedicated Windows 7 machine for critical unlocking tasks.