| Cause | Description |
|-------|-------------|
| Driver not installed | Reader installed via generic USB driver, not the vendor’s specific driver. |
| Driver corrupted | After Windows update or improper uninstall. |
| PC/SC service not running | Windows Smart Card service (SCardSvr) is disabled or stuck. |
| Reader conflicts | Another security software or virtual reader is interfering. |
| Group Policy | Managed systems may block non-approved readers. |
Run gpedit.msc →
Computer Configuration → Windows Settings → Security Settings → Local Policies → Security Options
Ensure these are set: the smart card reader is not configured properly install
Follow these solutions in order. Most users will find success by step 2 or 3. | Cause | Description | |-------|-------------| | Driver