Do I really need both 32-bit and 64-bit versions of Java installed?
When I go to get the latest version of Java on their website, it tells you that I need to install both 32-bit and 64-bit versions of Java because of the browser I am running.
Community Chosen Answer
If you plan to use the 64 bit version of IE or any 64 bit Mozilla browsers then yes. Both 32 and 64 bit IE comes with Win64...up to IE8.
I think IE9-10 are native OS architecture only now but other applications, like Spark for Openfire (depending on the download) may also require the 32 bit installed.