Why does my league client keeps on blurring out? Could anyone help! Thanks

Well as the title says, for some reason everytime I open the League client or is in the League client, everything goes from normal to blurry and then back to normal again. https://i.imgur.com/fLNRmkf.jpg https://imgur.com/K3CPgeH https://i.imgur.com/9brtKjw.jpg
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