Do you have a TFT/LCD screen? If so, then it may be autoadjusting to different settings when left idle. To fix it, if there is an "auto settings" button or similar (usually on the front on the monitor, labelled "Auto" or such like) then just press it and it should bring everything back into focus.
Hope this helps,
It seems that when I leave my computer and return, then all my text is blurry. Why would this happen? and is there any way to correct this?
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