The file j9vm23.dll is a core part of the virtual machine that belongs to IBM SDK (Software Development Kit), Java 2 Technology Edition from International Business Machines Corporation. A virtual machine is a software container that thinks it is a regular physical machine and can run its own operating system and software. This allows the user to run any type of software on that virtual machine regardless of the platform of the real computer.
Java uses virtual machines, and this file is part of a Java implementation of one. Java relies on this virtual machine to run, so an error with this file can potentially break any Java programs you have on your system.
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