Control Panel Icon

1st, try a system restore to when you know it worked.

 

You can also try these edits from Kelley's Korner

 

Control Panel - Display

This setting specifies the visual style of the Control Panel. Allowing you to either force the use of the new XP style, classic style or allow the user to select the preferred style. Go to Start/Run/Regedit and navigate to:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Create a new DWORD value, or modify the existing value, called 'ForceClassicControlPanel' and edit the value according to the settings (0 = force new, 1 = force classic).  Exit your registry, you may need to restart or log out of Windows for the change to take effect.

Control Panel - Icons Missing

Click Start, Run and enter REGEDIT

Go to: HKEY_CURRENT_USER\Control Panel\don't load

Look in the right pane and you'll see the Control Panel Icons that have been disabled. You can either right click on the "don't load" subkey and select Delete to restore all disabled icons, or you can right click on each of the items in the right pane and select Delete to selectively restore them. Scroll up to Control Panel Applets for a listing of what each one is.

The change will be seen the next time you open Control Panel.