Use MS Paint (the one that comes with all Windowses)
1. Set First chec the DPI from the properties.
If 96 use scaling at 32%.
If 300 all is fine so far. Go to point 2.
2. Check that fit to paper is off, scaling is set to 100%, centering is set on on both horizontal and vertical, orientation is set to Landscape, and the paper you are using is A4 or Legal.
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