When you scan, see if there is a 'descreen' button to check on your software.
This is for scans of images that have been printed with dots, such as newspapers and magazines. It should get rid of the bands of coloured dots that you sometimes get when you scan - works well for magazines, possibly not so well on newspaper, as their dots are coarser.
If you can't find the 'descreen' button, see if there is an 'advanced' tab to click when you scan, it may be hidden there if you are in (what my kids call) 'Nana mode', where you just click 'scan' and hope it comes out ok (and don't have to ask the grandkids which ones to click because there are too many options!)