In theory, wireless & ethernet networks should not interfere with each other. in our office laptop user preferred wired connectivity but also wanted wireless. In some cases where I re-install driver either wireless / wired adapter, the device could access the internet again (internet). So far only happened to Win 7 64 bit.
our internal wired and wireless clients get IP addresses from the same DHCP (different subnet on wired and wireless). The problem is, I have internet access via default gateway of the wired connection, but don't via gateway of the wireless or wise versa. what's the use case for having both interfaces live?