The Ez100pu is a legacy driver for USB-based Smart Card Readers (specifically those compliant with the PC/SC standard, often manufactured by OMNIKEY or Feitian). It is notoriously problematic on Windows 11 due to:
Q: Is the Ez100pu officially supported on Windows 11? A: No, neither Cherry nor Identiv lists Windows 11 as a supported OS. However, the Windows 10 driver (version 3.x and 4.x) is functionally compatible. Ez100pu Driver Windows 11
Most driver downloads come as a ZIP file. Right-click the folder and select Extract All. 2. Use Device Manager Right-click the Start button and select Device Manager. Look for Smart Card Readers or Unknown Device. Right-click the device and select Update driver. Choose Browse my computer for drivers. Deep Report: Ez100pu Driver on Windows 11 1
services.msc.