I tried this which I got from another internet site and it worked.
run 'regedit.exe'
goto key 'HKEY_CURRENT_USER\Software\Classes\LocalSettings\Software\
Microsoft\CurrentVersion\TrayNotify'
delete keys 'IconStreams' & 'PastIconsStream'
Start task manager, go to process and kill explorer.exe
go to applications in the task manager, hit new task and type
'explorer.exe'
explorer will now reboot and your icons should return. I had to go
to task manager and check the network and volume buttons.
Hope it works for you.
--
Wayne
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