Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
Re: Wired peer-to-peer connection w/ crossover cable using Vista
That won't work. Any networked device needs a way to acquire an IP address (DHCP) and needs network address translation (DNS). Just adding an additional NIC to your computer doesn't provide either of these. Now Windows does offer something called Internet Connection Sharing, and can offer the second NIC as a bridge to the Internet, but I can't walk you through setting it up on Vista. But be aware that ICS won't let your Roku see anything else on your network, such as a media server running DLNA, or allow the Roku app on a phone or tablet to see your Roku. It would be isolated from anything else. . Frankly, that OS is too old and troublesome. You should have upgraded to at least Windows 7, or better yet 10.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.