I have a Windows 7 Professional laptop.
At work, I connect via a wireless link that issues DHCP parameters. During one period, I needed to use a DNS server that was not the one issued by DHCP so that I could do testing with a new AD server. Now everything is consistent again, and I just want to use the DHCP issued parameters.
So I have brought up my network interface and clicked "Use DNS Server Provided By DHCP" (or whatever it says).
But the problem is: if I power up my laptop on the work network, then take it somewhere else where I want to use the wireless, I find that the DNS server has once again been hard-coded to the temporary server I put in. Which won't work in these other environments. So I have to once again open the network interface and click "Use DNS Server Provided By DHCP".
Why does the computer remember this hard-coded setting, and how can I prevent it from remembering again?