How to access internet connection on a Lenovo Flex 3 laptop?

Last night, I had tech support help me install Microsoft 10 after my product key number failed to work. It immediately shut down and all programs were installed, except my internet connection now has the "no connections available" error message.

I tried everything from the tutorials I found online and nothing.

I also threw out my laptop box so I don't know if I should take it back to the Best Buy I got it from (less than a week old) OR call Internet server.

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