Thanks for the info,
The first method only re-create the icon back to system tray temporarily, it is gone when re-start the system.
I tried the second method but for some reason my system (Vista) would not allow me to create "short cut" in that folder (I right click the mouse in the startup folder, no short-cut option).
I did not try uninstall/re-install route as I have bad experience with ESET new roll-out; last time I ventured to install a new roll-out version from 9x to 10x before the "push update", same issue (missing icon) happened, I have to search and found a older version to reinstall back.....
Once again thanks for the help TomeFace!
-Rich