Locate the driver package designated for (or the latest Windows 10 64-bit driver, which maintains full compatibility architecture).
After the driver is installed, some users have reported that re-enabling "Memory Integrity" makes the device stop working again. If you need high-level security, you may need to accept that the device won't work. If you need to read your Citizen Digital Certificate, you must leave it off. Conclusion EZ100PU reader
But in 90% of cases, 3.7.3.0 works out of the box.
To install the EZ100PU Smart Card Reader Go to product viewer dialog for this item. ez100pu smart card reader driver windows 11 better
(under Core Isolation) may block the driver because it is not digitally signed to modern standards.
: Reduced latency when reading chip data.
The compatibility situation between EZ100PU drivers and Windows 11 has been evolving slowly. The manufacturer began listing Windows 11 support on its driver download page sometime after Windows 11's October 2021 release. However, as of 2025, the available drivers still do not work with memory integrity enabled. Locate the driver package designated for (or the
– with the right driver. The REINER SCT cyberJack driver provides a better overall experience than any other option, including the default Microsoft driver, especially for healthcare and signature applications.
Microsoft periodically updates its smart card framework, which can improve compatibility with older devices.
I’ve seen a lot of people struggling to get the (Castles Technology) smart card reader working properly on Windows 11. The old drivers cause BSODs, random disconnects, or just won’t install. If you need to read your Citizen Digital
Would you like a link to the actual tested driver file or help extracting it from an official source?
If you installed the driver but Windows 11 refuses to load it, saying it is incompatible with security settings, you may need to disable Memory Integrity.
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Disable "USB selective suspend" in Windows Power Options to prevent communication timeouts.
If your smart card reader is still not working after the update, try these quick fixes: The Reader Status Light is Off