We have seen similar case in XP. Check this post.
Can't assign static IP to XP http://www.chicagotech.net/netforums...pic.php?t=3315
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
"wintercoldness" <wintercoldness@xxxxxx> wrote in message
>I recently bought a new HP Laptop dv6746TX with Windows Vista Premium and
> tried to set up my DSL connection with the LAN Ethernet cable.
> I called my ISP and they said I had to manually configure the properties
> the LAN by changing the TCP/IP v4 by inputting IP address, subnet mask,
> default gateway, preferred DNS and alternate DNS.
> However, when I put in all the numbers and pressed OK, my laptop
> automatically restarted itself. When I later checked the TCP/IP v4 data,
> reverted itself to "Automatically obtain ..." instead of retaining my
> manually inputted data.
> How can I correct this so the TCP/IP v4 keeps the data I inputted and also
> without randomly restarting?