Latitude E6500 Lost my sound, network, and battery icons in system tray (Vista Ultimate SP2 32bit)

Hi,

Latitude E6500 running Vista Ultimate SP2 32bit

I recently installed the latest Windows update and at the same time downloaded and installed some Dell drivers.
Of course I didn't make a note of which Dell drivers/utilities I installed :emotion-6:
After installation everything is still working fine, but I no longer have my network icon, my sound icon nor my battery icon in the system tray.
Any idea how I can restore them?
BTW my oldest restore point is not old enough, so that's not an option.

Cheers,
rev