I have my 360 and Vista-based PC connected to an NR041 router. My PC detects my 360, but not the other way around. I've tried just about everything. File sharing has been enabled on Windows Media player 11 (which also detects the 360). The router settings are at default. No port forwarding has taken place. Should I be using crossover cables? I read that they maybe be necessary for two computers to communicate with each other if the router doesn't support internal crossover connecting. Though the 360 isn't a exactly a computer running the same OS, networking is networking, right? The IP's are all obtained automatically between the 360 and the router, and the IP of the 360 and PC are in the same range. But I think that's just for internet connectivity. There are some ports that are suggested to be open for the media sharing software to work, but I'm not quite sure where in my router to open them...if it's in my router at all.
Asus Striker Extreme
Intel Core 2 Duo 3Ghz
nVidia GeForce 8800 GTS
4GB DDR2 Dual Channel
X-Fi Elite Pro
400GB SATA