| Error Code | Meaning | Solution |
|------------|---------|----------|
| Code 52 | Driver signature blocked | Use signed modern driver |
| Code 39 | Corrupt driver | Remove via pnputil /delete-driver |
| BSOD 0x139 KERNEL_SECURITY_CHECK_FAILURE | Kernel API mismatch | Use alternative driver |
| 0x80070057 (during install) | Invalid INF section | Edit INF to remove NTx86… references |
The Ez100pu driver was widely deployed for:
The driver emulates a serial-over-USB interface using the EZUSB chipset (Cypress FX2LP-based). Ez100pu Driver Windows 11
Officially? No. Most manufacturers stopped updating the Ez100pu driver after Windows 8.1. However, the Windows 10 driver is fully compatible with Windows 11 (both share the same core architecture). You just need to install it correctly.
Follow these methods in order. Method 1 works for 90% of users. | Error Code | Meaning | Solution |
Some Windows 11 systems (especially on newer Intel/AMD chipsets) disable legacy USB support in BIOS to speed up boot times. This kills Ez100pu communication.
Cause: The PC/SC service is not running, or the app is looking for a different reader name. The Ez100pu driver was widely deployed for:
Fix: