Create a folder in a location you'll remember (like ... a lot of people want to use them for their desktop background. One of the downsides to using the Windows Spotlight images already stored ...

Basically, the Desktop icon fonts are dynamic and change accordingly to the desktop background so that they are readable. Try this workaround and see if it helps. Open Settings > Personalization.

Next, open up the ‘C’ drive (the location where usually your OS is installed) and navigate to the following location: In the Assets folder ... Spotlight as a desktop background.