This fundamental compatibility conflict is why simply installing the driver may not be enough. Fortunately, there are well-established ways to get the device working again.
The EZ100PU is a USB smart card reader manufactured by Casper (often branded as Casper NIR). It is commonly distributed by banks and government institutions for secure online authentication. Ez100pu Driver Windows 11
Many users find that after installing the EZ100PU driver on Windows 11, their computer doesn't recognize the reader, or it stops working intermittently, showing a yellow exclamation mark in Device Manager. The main cause of this is a Windows 11 security feature called , part of the Core Isolation function: It is commonly distributed by banks and government
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A: This Blue Screen of Death (BSOD) error is often directly related to the EZ100PU driver's incompatibility with Memory Integrity. Ensure that Memory Integrity is completely disabled before you plug in the reader and install the driver.
Smart card readers are security-critical hardware.
If the automatic installer fails or you prefer more control: