I can't say which icons specifically caused the issue as I just wholesale deleted them all and remade them but I can give you a list of the icon types I did have.
1. Regular Icons that link to programs. This includes programs like Prime95, Heaven Benchmark, Cinebench, ect
2. Drive/folder Icons that link to a commonly used drive / folder. Things like my Music folder, video folder, work folder, ect.
3. Symbolic Links. I have a few of these to make it easier to access everything all in one location on the desktop.
I have about 130 icons on my desktop split between 15 fences. If you need more details then that just ask, I'll provide what I can.