Changing fonts

Yesterday I wrote in as I am having an extremely hard time changing fonts. I have disabled all plug-ins changed all fonts on stylesheet to Verdana,changed all fonts in design settings to Verdana, saved, refreshed, cleared cache. Nothings works. Yesterday you instructed me to style the body element along with the CSS and an !important on the end. That still did not work. Are my files corrupted from maybe trying to change so many things for months?? I am a newbie so lord knows what I might have messed up. Any help is appreciated.
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