I have been using a small Zotac box hooked to the backside of my monitor as a desktop pc for some time running linux on it. After i decided to switch to Windows 8.1 i have been using this box for a short time. For some reason this box has become slower and slower until a point where i was really pissed. About 1 hour later i bought a refurbished HP Z600 box for a bit more money then usually. This box has 300GB (15K rpm) disk; 2 x Quadcore Xeons amd 8 GB of RAM. A few days later i received the box and the adventure of installing this system started.