Scott Hanselman posted an article (see below) about what he calls the "Nuclear Option" for restoring network connectivity issues. I took the commands from his post and created a cmd file that I could run and it works well.
I knew about some of these, but not all, and I can never remember the ones I did know when I need them. So this post is as much a reminder to me as anything else.
Go see his post for more information.
The Nuclear Option: Resetting The Crap Out Of Your Network Adapters in Vista
I was having a number of strange network issues on a laptop today. Here's the complete nuclear option for resetting your whole IP stack. This is for when "Diagnose and Repair" isn't cutting it. Thanks to JohnP for his help.
Go to the Start Menu, type cmd and right click, and select "Run As Administrator"
Type the following commands, each followed by pressing enter.
ipconfig /flushdns
nbtstat -R
nbtstat -RR
netsh int reset all
netsh int ip reset
netsh winsock reset ... (Read more at source)
Cheers,
Robert Porter