Also, you may try the following:
First, let's try to find if you get to Internet at all.
Click on START and then RUN. In the small window, type cmd and then click OK or press ENTER.
A DOS window wil open and you'll see a blinking cursor.
and press ENTER
you should get 4 lines with something like
'Reply from 220.127.116.11: bytes=32 time=90 TTL=52'
If you get
'Reply from 18.104.22.168 time out, it is NOT good.
Then try this:
ping 22.214.171.124 and press ENTER.
Did something change?
Leave this (DOS) window open.
Open START, then Control Panel and then Internet Options.
Click on Second Tab, SECURITY.
You will see 4 icons. All of them should be set to Default Level.
If they are not, set them on Default Level selecting one by one.
(If you are using IE7, than you can click on
'Reset all zones to default level')
Now, go to ADVANCED Tab and click on
'Restore advanced settings'.
Click APPLY and then OK.
Now, go back to DOS window and repeat the 'ping' commands.
Any changes ?