Installation of the Microsoft Java Virtual Machine is very simple:

1. Do the Microsoft JVM Check
2. If no Microsoft Java Virtual Machine is present on your OS download & install the first file which you can find in the Downloads section
3. After that install the other two Microsoft Java Virtual Machine files or visit Windows Update to get the latest security update available
4. If you need help installing one of the downloadable files, check the help documents in the submenu on the left
   

or:

1. Check the Sun Java Virtual Machine section to install that version of the software, you find it in the Downloads section
2. Choose the automatic or the manual way to download the Sun Java version