1. Start -> Control Panel -> Add/Remove Programs -> Add/Remove Windows Components
3. Go to Networking and click details
2. Tick the “Peer-to-Peer service” option and the “UPnP User Interface” option.
4. Click OK to get out of those dialogs, Windows will install some stuff for a minute or two, then try sending a file again.
5. Sit, Enjoy and wait for futur msn bug to pop in your face
I’ve found that doing the above restores full speed to MSN file transfers (you may wish to advise your contacts to do the same if they’re behind NAT devices – i.e. if their external IP address differs from their internal IP address – but transfers should be fine so long as at least ONE of you is either not behind a NAT device or has the peer-to-peer service installed).