Could be a general problem with the icon cache database. Try this.....
Close all folder windows that are currently open.
Launch Task Manager using the CTRL+SHIFT+ESC key sequence, or by running taskmgr.exe.
In the Process tab, right-click on the Explorer.exe process and select End Process.
Click the End process button when asked for confirmation.
From the File menu of Task Manager, select New Task (Run…) Type CMD.EXE, and click OK
In the Command Prompt window, type the commands one by one and press ENTER after each command: Make sure you leave the spaces.
CD /d %userprofile%\AppData\Local
DEL IconCache.db /a
In Task Manager, click File, select New Task (Run…)
Type EXPLORER.EXE, and click OK.