Can I upgrade/switch my system from i686 to x86_64 without reinstalling?
This is highly misleading. The real answer is "No". If a person backs everything up and then installs the new OS in the normal fashion, one has not "upgraded" or "switched" "without reinstalling". They have actually installed a new operating system on a freshly formated hard drive and then copied back some settings. They may even have to re-install many applications, as well! This is crazy. - KitchM 22:28, 30 October 2011 (EDT)