First I added  8Gb RAM Crucial DDR3 and a USB drive without Hard Drive.I started installing VMWare ESXi (you can find instructions in the web about installation and drivers).Installation worked perfectly, except when trying to startup virtual machines, it was supposedely work with the guests on my LAN drive (MyBookLive), that did not worked, and I was not thinking on getting a better SAN (like Synology, because of $$$).So then I invest on a 120Gb mSATA SSD haard drive, and installed guest linux on the local drive, that is when I found the ESXi issue (version 5.5), it does not provide direct access to the sound and video cards and the issue is that I wanted to have a guest running Plex Media Server, well PMS uses direct access to the sound card and video card to perform transcode, it did not work with ESXi.I decided to give a try to Microsoft Hyper-V, I have never liked it since in order to have an Hyper-V server you also need a Domain Controler and DNS Server ( or performming some special configurations). Instead of a lightweight Hyper-V only version I decided to install a full version of Windows Server with Domian Controller and DNS, then I installed Hyper-V Role on it, It worked perfectly after the manual installation of the Drivers (You can download them from Intel's web page, use the latest windows 8 drivers, since Intel does not provide Server drivers for this NUC).Then I installed a guest with Linux and Plex Media Server, it has been working perfectly (Host and Guest are installed on local HD and my movies reside in Western Digital MyBookLive).I have to say that Hyper-V has exceeded my expectations, I still need to install some other home test servers on it like Oracle, MS SQL Server, Web Server, etc.But the best part is that this little NUC works better than my rack server I used to have (for my home lab), it consumes way less energy, and specially the sound, you cannot hear this little thing working.