Post back with the results of ipconfig /all before and after switching.

--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"zeeeej" <zjennings@gmail.com> wrote in message
news:9596083c-cea5-4f84-95aa-4775476d9e57@c58g2000hsc.googlegroups.com...
>I have a strange problem that has popped up in the last couple of
> weeks. If I changed something in my network settings to cause this, I
> can't for the life of me figure out what it was ...
>
> The problem is that whenever I switch physical networks (between
> various wired or wireless networks), which I do a lot, I am forced to
> reboot to use the network at all. Here are some of the symptoms:
>
> - I do get an IP address.
> - I can't ping ANYTHING (by name or IP) on the network until after a
> reboot - including the DHCP server that gave me the IP address.
> - I have tried the Windows right-click and "repair" function with no
> effect.
> - Connecting to/disconnecting from a VPN works (thankfully) as normal.
> - If I am working on Network A, then switch to Network B, it will
> fail. But if I then switch back to Network A without rebooting, it
> will work again.
>
> Any ideas are welcome for this frustrating problem. Thanks in advance.