解决如下:
Open with notepad C:\Windows\System32\Drivers\etc\ho­sts
Add:
65.54.239.80 messenger.hotmail.com
65.54.239.80 dp.msnmessenger.akadns.net
Save and restart MSN
Add:
65.54.239.80 messenger.hotmail.com
65.54.239.80 dp.msnmessenger.akadns.net
Save and restart MSN