Problem – Jar (.jar) files are not working as it should be they are opening in Nokia Pc Suite or in other program. Solution – Easiest way to solve this problem 1. Uninstall the program in which they are opening. 2. Now change the open with setting of .jar file a. Set it to Java(TM) SE Platform. b. Mark Always open in this program 3. Now again install the program 4. This time jar files will work properly.