Start the service. This prevents the "Reader not found" lag when you first insert your card. Disable USB Selective Suspend
If you are still experiencing dropped connections, check the manufacturer's site for a firmware update tool. A firmware flash can often resolve hardware-level handshake issues with the Windows 11 USB 3.0/3.1 stack. Troubleshooting Common Windows 11 Issues ez100pu smart card reader driver windows 11 better
Uninstall any existing "Smart card readers" or "Unknown devices" related to the EZ100. Run the downloaded driver installer as . Start the service
Look for versions released after 2021 to ensure native Windows 11 support. 3. Clean Installation Process A firmware flash can often resolve hardware-level handshake
Windows 11 is aggressive with power saving. If your reader randomly disconnects: Go to > Change advanced power settings . Expand USB settings > USB selective suspend setting . Set it to Disabled . Firmware Check
Mastering the EZ100PU Smart Card Reader on Windows 11: A Complete Driver Guide
Windows 11 introduced stricter driver enforcement and memory integrity settings (Core Isolation). While Windows Update often installs a "generic" Microsoft Usbccid driver, this basic version frequently lacks the full command set required for specific middleware (like those used for e-ID cards).