电脑可以上网，却打不开网页，怎么办？

我爱自己

不知道是否是因为电脑是公司的电脑，所以在家里能上网却打不开网页，唯一能打开的就是狮城网。
出现的问题是：
Dear user,

You may be experiencing some difficulty in accessing the Internet.
This may be due to the modem set-up.
Please follow the step-by-step instructions below to setup your modem and you will be able to access the Internet.

If you still experience difficulty after following these instructions,
please call 1800 8486933 (SingNet Technical Helpdesk).

We apologise for the inconvenience caused.

This is an auto-generated message.

Quick PPP(point to point protocol)Configuration GuideStep 1
Open the web browser and enter http://gateway.2wire.net/.
The web browser will bring up the configuration page as follows:

Step 2
Click on the "Internet Connect/Disconnect" link.
This will bring up the PPP configuration page as follows:

Step 3
Enter your Username and the current password and click"Connect".
For example, if your Username is "tester" and Password is "test123",
enter Username as "tester@singnet" and Password as "test123".
Note: If you are using default Username and Password,
which are printed on the Service Letter that had been mailed to you
when you first installed the modem, please use that Username and Password.
Congratulations! You have completed the PPP configuration.
You should be able to surf the Internet now.

怎么办？