Java Virtual Machine is a necessary application for visualizing certain Websites that require the JVM.
The JVM (Java Virtual Machine) is only an aspect of Java’s software, specifically used for the interaction in the web. You will be able to visualize webpages that require the use of JVM. May be your Windows XP does not have the Java Virtual Machine, so do not doubt in downloading the JVM. Programs such as the Azureus require Java Virtual Machine’s installation.