一、去掉小箭头
  新建一个文本文档,后缀修改为.bat,加入如下内容:

reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons" /v 29 /d "%systemroot%\system32\imageres.dll,196" /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

  二、恢复小箭头

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