I do not want Windows 10 installed so how do I remove the windows10 logo from the bottom of page.

I at first said I wanted the free download for windows 10 1 year ago & the Microsoft logo came up on bottom of PC . I have since tried to get rid of it as I am not interested in installing it. Ever since the logo has been there my data usage is all gone in 2 weeks instead of a month & this is the only thing different we have done. Can you please get rid of it or tell me how to do it?

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