Upgrades, upgrades, upgrades (ongoing)... Please keep in mind that most prices below have changed since I made these purchases, and some of these items may not be available anymore. That's
why it is recommended to shop around for best deals.
Windows 8 Enterprise 64-bit (x64): what a piece of guano! Not worth even the few minutes I spent installing it. Removed it next day. Worst GUI, most annoying + least functional of any
Windows OS I have ever used. ;-(