This might be due to a mismatch in Java version. You may have Java 6, which may not be fully compatible with PS applications.
You can confirm Add/Remove the Java version on the system by going into the Control Panel Programs (or Programs and Features if Vista/ Windows 7) and go through the list & look for Java (TM). If it reads a higher version than Java 5 like Java (TM) 6, please uninstall Java 6 and install Java 5 from the link given below:
http://www.oracle.com/technetwork/java/javase/downloads/index-jdk5-jsp-142662.html
(Scroll down on the page for JDK 5.0 Update 22 Download )
This step should help in resolution.