My P3 Win XP machine was deprived of Internet for last three weeks due to Error 678 when connecting to BSNL Dataone broadband service.

Finally managed to resolve the issue.
Thanks to
google and
http://www.tiscali.co.uk/help/broadband/error_678.html.


This error normally occurs when using Windows XP.

This can be resolved by following these steps:

* Restart your computer and wait until all applications have completely loaded before trying to reconnect.

* Click on the Start Menu and then select Run. In the box which appears type the word command in order to open the command prompt and then click OK. In the black command prompt window, type netsh interface ip reset log.txt and click on Enter on your keyboard. Then type exit into the command prompt and then click on Enter on your keyboard. Now restart your computer and reconnect to the Internet.