Some things in life are simple, an installation of Java is a perfect example of this. To install Java on your workstation you go to the website http://www.java.com/nl/download/

My work started at the point where a Java application didn't start. A website offered a .jnlp file (Java Network Launching Protocol for the diehards) but when you selected the file.... nothing happened.

I started a search and installed both the 32- and the 64-bits version of Java on the 64-bits of Windows 7 system. None of the combinations delivered a proper solution. 

When I visited the Java website, I saw that a .jnlp needed the Java Web Start application to get started. In my software list in the control panel, was no separated product like "Java Web Start".

The Java Web Start application is simply installed by the installation of Java in the way I mentioned before and will be on your computer by the name of JavaWS.exe

The most simple solution to this problem is to open a .jnlp file once by the option "open with" which will show up when you select the file with a right mouseclick. When you are asked to select a program to open the file, you search on your local harddisk for JavaWS.exe and select it (don't forget to select the flag "always use this program to open this type of file").

After this action, you can open Java applications without any problem.