Welcome to Tech Support Forum.
I'm going to talk you through rebuilding the icon cache in Windows 7.
It looks like this is what is at fault in this circumstance.
Please follow my instructions carefully, if you don't understand any of my instructions; please ask for clarification.
1) Please open up notepad.
2) Copy and paste the following into notepad.
echo The explorer.exe process must be terminated to flush the icon cache.
echo Save all work before pressing any key.
taskkill /IM explorer.exe /F
echo Attempting to flush icon cache...
If exist %userprofile%\AppData\Local\IconCache.db goto delID
echo Icon cache has already been deleted.
cd /d %userprofile%\AppData\Local
del IconCache.db /a
echo Icon cache has been successfully flushed.
echo Windows 7 must be restarted to rebuild the Icon DB.
set /p choice=Restart now? (Y/N) and press Enter:
If %choice% == y goto Yes
If %choice% == Y goto Yes
If %choice% == n goto No
If %choice% == N goto No
shutdown /R /f /t 00
echo Restart aborted. Please remember to restart the computer later.
echo You can now close this command prompt window.
Once pasted into notepad please press Save As...
Save this file to your desktop as IconDB.bat (making sure to change Save as Type to 'All files')
Once you have saved this to your desktop run this file, once done please restart your computer.
If this has not fixed your problem, please let me know.