Jim...did some checking for you and found 3 methods to restore the icons. Not sure, but you might have tried one or two already:
Method1:
Login as an administrator
a- Run the System File Checker Scan.
b- Press the ‘Windows + X’ key on the keyboard.
Select Command Prompt (Admin)
c- Into the Command prompt window, type "sfc /scannow"
d- Check the results.
Method 2: I would suggest you to perform a system restore.
a Press ‘Windows + R’ key to open ‘Run’.
b In the ‘Run’ type ‘rstrui’. Click ‘OK’ to bring the ‘System Restore’ interface.
c Following the steps as mentioned in the interface to restore the computer to a previous point.
Note: When you perform System Restore to restore the computer to previous state, programs and updates you installed are removed.
Method 3:Run the Modern UI App troubleshooter and check.
http://download.microsoft.com/download/F/2/4/F24D0C03-4181-4E5B-A23B-5C3A6B5974E3/apps.diagcab
Hope one of the 3 helps. 