Error:
Unable to launch the java virtual machine located at path C:\Program Files\sqldeveloper\jdk\bin\msvcr100.dll
(sqldeveloper-4.2.0.16.356.1154-x64)
One easy solution:
Look for:
C:\Program Files\sqldeveloper\jdk\jre\bin\msvcr100.dll
copy: msvcr100.dll
Create and place the copy here (create a bin directory - basically place a copy of the file where it's looking for it)
C:\Program Files\sqldeveloper\jdk\bin\msvcr100.dll
Moving the actual bin directory doesn't work, but placing the msvcr100.dll where it's looking - does work.
Hope this helps!
Joelle C.