Every time a member booted up his computer, all the icons on the desktop would briefly disappear and then get rebuilt. A suggestion to remedy this situation was to delete the icon cache file.
In Windows 7 through 10, this can be done as follows:
(1) In File Explorer, navigate to Folder Options, and turn on the options to View and Show Hidden and System Files
(2) In C:\Users\%username%\AppData\Local folder delete the hidden IconCache.db file
(3) Reboot
In Windows 10 you also have to:
(4) Go to C:\Users\%username%\AppData\Local\Microsoft\Windows\Explorer
(There are a bunch of files like iconcache_32.db, iconcache_48.db, iconcache_96.db, iconcache_256.db, iconcache_1024.db, iconcache_1280.db, iconcache_1600.db, iconcache_1920.db, iconcache_2560.db, iconcache_exif.db, iconcache_idx.db, iconcache_sr.db, iconcache_wide.dd, iconcache_wide_alternate.db, etc.)
(5) Delete these files