Copying binaries to the system directory goes against Microsoft standard practices. Please see the following CR for 8u20/9
Our justification and design is described in the ccc request at http://ccc.us.oracle.com/7166597
We've stopped copying java.exe/javaw.exe to the system directory n 8u20. Under this CR, we need deployment team to stop copying javaws.exe to the system directory, and instead create a symlink in the new javapath directory. It is a fairly simple fix on the deploy side. This is a high priority due to files-in-use scenarios with JRE upgrades.