If you're using Internet Explorer to download Microsoft Edge, you might need to add officeapps.live.com to your browser's list of trusted sites.
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In Internet Explorer, select Tools > Internet options.
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Select the Security tab, then select Trusted sites (with the green checkmark) > Sites.
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Under Add this website to the zone, type https://officeapps.live.com, select Add, and then select Close.
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Continue downloading and reinstalling Microsoft Edge.