<p>Where, or what format, are the images used by Windows 10 when logged out or in lock-screen?</p>
<p>I searched the entire drive for *.jpg, *.bmp, *.png, and *.tif but the one I was looking for did not appear.</p>
<p>At first glance, <a href="https://superuser.com/questions/966650/path-to-current-desktop-backgrounds-in-windows-10" rel="noopener nofollow ugc">Path to current desktop backgrounds in Windows 10?</a>, although not exactly a duplicate, appeared to have the path I wanted. But when I went there, the pre-login image was there, but the lock-screen image was not. (And contrary to the claim in that answer, the files there <strong>did</strong> have extensions.)</p>
<p>MISE À JOUR : Je viens de did a lockscreen, and got an image that IS in that directory, but earlier today, it was consistently an image of an interesting footbridge that is <strong>not</strong> in that directory.</p>