no internet at all

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Remove any proxy settings
Check your browser's settings, remove or uncheck any proxy settings if found

http://www.plus.net/support/software.../proxies.shtml
http://www.ehow.com/how_5512742_remo...xy-server.html

Google Chrome
https://support.google.com/chrome/answer/96815?hl=en-GB
This will open the Internet Explorer Properties dialogue (Windows) or the Network dialogue (Mac) where you can adjust your network settings

Firefox
Tools>Options>Advanced>Network Tab>connections Settings... button>
Newer release version see here https://support.mozilla.org/en-US/kb...ction-settings
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What windows version are you using ?