I have succesfully enabled myself and other people to connect to the same server with no lag problems or anything like that.
However, after a while (connection from modem) or immediatly (connection from router), my internet crashes.
The logo on the taskbar shows I'm still connected, but MSN and Skype are most definitely logged out, and no websites work.
When I go into Control Panel or Network to alter any settings, the respective windows crash as soon as I alter anything to do with my network, such as disabling it, or reinstalling the driver.
Resetting my router causes the internet logo to immediately respond, as does resetting my modem, but it doesn't return to the online logo when I reconnect.
I am running 32bit Vista
If you need any other information, I'll provide it, and if you can suggest another website to post this on (as this seems to go past minecraft) then I'd appreciate it.