Microsoft Windows Vista Premium SP1 64-Bit Full Version for $89.99 shipped. This is the complete full version and not the upgrade version. Note that it comes in OEM packaging, which means no pretty retail box and marketing materials, but the software itself is identical. More information about OEM software can be found here. Since this is the 64-bit version, it’s important to make sure first that all the necessary Windows Vista 64-bit drivers for hardware devices are available.