Ok, I have reinstalled vista ULTIMATE over 3 times now to attempt to get this to work and every time i get the same results. I have a 360 that i would like to connect to my vista pc however I cannot seem to get this working. At this point im desperate. My setup is as follows: I have a fresh install of vista on my pc. I have turned off the windows firewall on the pc. I do not have any antivirus installed on my pc or windows one care. I run my pc into a router, a Dlink WBR-2310. I have my 360 connected to a game adapter wirelessly on my network. I have file sharing ON in vista, as well as media sharing. My network is set to private. When i power on my 360, I do get a notification in the system tray about an extender being available. If i was to try and configure my extender i would receive an error. That error in the event logs shows a code of -209. I have also tried to connect my 360 directly to my router, so that both my pc and my 360 are hard wired. Same error. I have tried to connect my pc and my 360 directly to each other with a crossover cable, same problem. One thing i did notice is that under the media sharing in vista, my 360 will not show up. Also, my 360 does not show up under network devices as well. However, I do have a laptop that runs MCE 2005 and everything connects fine to that system - wired, or wireless. I do see the 360 in the media sharing of my laptops MCE 2005. So I asking for any help at all. This VISTA software is a nightmare. I cant understand why my 360 will not connect to my pc. Btw, I have also tried statically setting IP addresses as well dynamically using DHCP to set IP addresses, and nothing. My 360 is up to date with xbl updates as i play on xbl fairly often. The install of vista was done on a separate hard drive from where my XP installation is. The partition was formatted as PRIMARY and NTFS. I change which operating systems boots by the bios, but for the most part, the XP drive has been removed during these tests. Someone else has to have experienced this problem.