If you have installed Eclipse Helios (64-bit) on Windows 7 (64-bit), make sure the correct version of java (64-bit) is installed on the computer:
http://www.java.com/en/download/manual.jsp
If you have java installed and you get the error shown below when you try to run Eclipse chances are you have the 32-bit version of Java installed:
"Failed to load the JNI shared library "C:\Program Files(x86)…”
Thanks to this post from the Eclipse Community Forums
http://www.eclipse.org/forums/index.php?t=msg&goto=542940&#msg_542940
Troy