It looks like the exported file is utf-16 (at least that's what gives me legible results when I open it using that encoding), but apparently RegSetValueEx wants a utf-8 encoded string?

Source code for the Java Development Kit (JDK) would be redone in UTF-8 (Unicode Transformation Format) to facilitate better-defined encoding, under a plan afoot in the OpenJDK Java community.

UTF-8 Encoding for Excel Using Java. Typically, using standard formats when programming can help you migrate information between different programs. Using the Comma Separated Value file format ...

In the latest Windows 10 Insider build, Microsoft has released a new version of Notepad that includes changes that bring it closer to what we have come to expect from modern text file editors.