javaw.exe won't close properly
I have JDK version 7 update 51 installed on Win7 (64bit). When I open and then try to close the Java Control Panel it brings up a message "Java Platform SE binary has stopped working" and the program is forced to close. I also find that other Java apps also hang when trying to exit with javaw.exe not closing and needing to be forced closed. I've tried to reinstall Java a number of times but with no change.
Could someone give me some advice for how I could find the soure of this problem.