Sometimes when I start my computer, there will be small icons on my shortcuts where there is supposed to be the shortcut icon, like this arrow:
This appears on every thumbnail on my desktop. The small icon also often changes; once it was a red cross, another time it was a gray circle and once it was a key. However, clicking the shortcut doesn't seem to do anything other than run the program it leads to. I'm running Windows 10.
I'd like to know what causes this.