Thank you for your query
Please can you advise what you mean by icon overlay, what are you saying and what do you think you should be seeing?
The icon you are referring to is a shortcut icon, these are normally put on your desktop when you install a program thus allowing you to double click on the icon rather than clicking on start>programs and so on, these are quite harmless and if you do not need them you can delete them, without deleting the program itself
I hope this has been useful
Please try the following, please note to remove the 2 arrows does involve a registry change, alternatively you may want to uninstall and then reinstall Norton first
This tweak removes the shortcut arrow
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Explorer \ Shell Icons
C:\Windows\System32\shell32.dll,50(shell32.dll,50 is a empty icon)
(shell32.dll,50 is a empty icon)
To apply the changes instantly, follow this
The changes will be applied now. Repeat the above steps and then set the Icon size back to 32 (defaults). The above steps are required to force Windows to redraw the icons. Even Tweak UI does this.