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. Your subject says nothing about the nature of your urgent problem, which makes it difficult for forum members to know if they have knowledge that could help you.
With regard for your problem, go to the main menu (the button at the left end of the panel at the bottom of the screen) and left-click the button. In the menu, look for Internet or Network category. Click on the one you find, then look for something to do with network devices. That would be the place to find setup software to setup your internet connection.
Since you say nothing about your network hardware and type of connection (modem, cable, etc), I can't help you beyond the suggestion I've given above.