If you ever have blank icons, or icons that look like they are not associated with any program but should be, you can correct the icons by rebuilding your iconcache by doing the following: 

Rebuilding the Icon Cache Database

1. Close all folder windows that are currently open.

2. Launch Task Manager using the CTRL+SHIFT+ESC key sequence, or by running taskmgr.exe.

3. In the Process tab, right-click on the Explorer.exe process and select End Process.

4. Click the 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%AppDataLocal
DEL IconCache.db /a
EXIT

8. In Task Manager, click File, select New Task (Run…)

9. Type EXPLORER.EXE, and click OK.