Try rebuilding your Icon cache.
1. Close open folder windows.
2. Launch Task Manager by right clicking on the taskbar, then select start task manager.
3. In the Process tab, right-click on Explorer.exe process and select End Process.
4. Click on End process button when asked for confirmation.
5. From the File menu of Task Manager, select New Task (Run…).
6. Type CMD.EXE, and click OK.
7. In the Command Prompt window, type the commands one by one and press ENTER after each command:
CD /d %userprofile%\AppData\Local
DEL IconCache.db /a
EXIT
8. In Task Manager, click File, select New Task (Run…)
9. Type EXPLORER.EXE, and click OK.