[WindowsCentral.com]

Are icons on your desktop appearing blank or broken? Maybe it's time to rebuild the icon cache database on Windows 10, and here we show you how.

On Windows 10, those icons you see on files and apps are stored in the icon cache database to allow the operating system to display them quickly on the screen. The process of caching icons, instead of retrieving them from the source, helps to prevent your system from getting bogged down by the mere task of "showing icons".
However, as the database grows, the odds of icon cache database getting corrupted also grows. When this happens, icons on your desktop and throughout the operating system may not render correctly or even appear broken.
Although Windows 10 doesn't include an option to reset the database, you can still fix the problem using a few commands in Command Prompt.

Full story from the WindowsCentral blog...