Hi, I have a Window Home Server 2011 NAS at home where I put all of my movies and videos. I have another computer that I use Windows Media Center (on a WIndows 7-64 bits edition) on it where I point my librairies onto the NAS and that I connect to my HDTV. I have a gigabit router where I connect both devices. I ran into issues when I was viewing videos and HD videos. I was having video lags or it was regularly intermittently be lagging. So I started the Task Manager - looking at the networking performance. I did a file copy test. I got around 450 megabits (45%) substained result. So I tested it with a movie via The Media Center application. The Task Manager reported 0 to 2.5% usage having unregular network traffic, going up and down every second or so, and having lags, as usual. I fixed the issue by doing this : (lag issue resolved reading videos and movies on shared drive) The solution to this is to elevate to "Real-Time" the priority of the "Server" process on the NAS (or on the computer where the videos and movies are stored). In the Task Manager, under Service tab, right-click on the "Server" process and choose "Go to process". You will redirected on the "Process" tab directly on the specific process of the "Server". Right-Click on it and choose "Set Priority", set it to Real-Time. Hope this will help people from this lag issue. I don't know if this impact the "Streaming" to an Xbox, but will try. I did post this because I could not find any solution on the web for my problem and I found the solution by myself.