: Corrupted driver installation or conflict with another USB device. Often happens after a Windows update changes the USB stack.

: The process is trying to write a large log file repeatedly, often due to a missing configuration file. Alternatively, a malicious variant is encrypting files (ransomware behavior).

In the vast ecosystem of Windows processes, few filenames generate as much confusion as cardlock.exe . For many users, spotting this executable in the Task Manager triggers an immediate concern: Is it a virus? Is it a critical system file? Or is it a harmless relic of forgotten software?