hi,

i am having braodband connection and using windos xp sp2.... at first, i was connecting to the internet by double clicking my connection icon, which would prompt for username and password... now i have formatted and re-installed windows xp... now my broadband connection connects to the net automatically without asking for username or password... how to get rid of this????

Create two batch-files, one with this line:

ipconfig /release

and the other with this:

ipconfig /renew

The first one will disconnect you from Internet and any kind of LAN. The other one will request an IP from your ISP and then Internet should work.

The reason for this could be that you are behind a router and the router do the login for you. Else, it seems like your ISP is using PPPoE and normal DHCP to let you out on the Internet.