New
#11
Internet Explorer x86 is the 32-bit version of the browser while IE x64 is the 64-bit version.
You can use either one of the two and you may find that IE x64 loads a bit quicker although you may find there are issues with Adobe Flash x64. Adobe have released a beta version of their Flash 64-bit application, but we're still waiting for the full working version for IE9 x64.