Small things very easy, simple mention here
Create a notepad, write the following code, to .bat suffix, double-click operation, and the arrow disappears
reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons" /v 29 /d "%systemroot%\system32\imageres.dll,197" /t reg_sz /f taskkill /f /im explorer.exe attrib -s -r -h "%userprofile%\AppData\Local\iconcache.db" del "%userprofile%\AppData\Local\iconcache.db" /f /q start explorer pause
If you want to restore the arrow, just put the code into the following things run on the line
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons" /v 29 /f taskkill /f /im explorer.exe attrib -s -r -h "%userprofile%\AppData\Local\iconcache.db" del "%userprofile%\AppData\Local\iconcache.db" /f /q start explorer pause