Problem:

Sometimes none of the/not all of the system tray icons show

Solution:

Get the Taskbar Repair Tool Plus! from Kellys Korner or from my mirror download location.

1) Select “Show Missing Icon” under the “Notification Area” and tick the checkbox at “Disable SSDP and uPNP Services” and click “Apply” (see below).

2) Again, under “Notification Area”, select “Remove the Notification Area” and untick “Remove Notification Area” on the right (see below).

That’s it.