compressing

• Stop Windows from Compressing Wallpaper Sep 14 2017
  By default, Windows compresses your desktop wallpaper by up to 85% of its original quality. This is done to maximize performance because most people don’t need a 50 MB image eating up precious RAM. There are two methods that you can use to stop Windows from compressing wallpapers. The first (unconfirmed) method is to use a PNG image file. There have been some reports that on the latest Windows 10 Creator’s update, PNG images are immune to Windows compression.

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