If your problem is the disappearing Task Manager icon, then read on.If, however, other systray icons disappear as well, then you should first skip this chapter and continue with the next.In this case the main solutions below will not work. There are a few other problems that can cause similar behavior and can mislead you into believing that they are the same problem.If you are not sure, read the entire article first, because a few more are described later.Be careful not to be fooled by others or by your own brain that may see causality where there is none.People try the weirdest things, then they get all their icons and conclude sharply, but wrongly, that whatever they did solved the problem.You can reactivate it later if all other problems are identified or solved.In Vista, if the Clock, Network, Volume and Power icons have disappeared and when you go into properties on the taskbar and look at "System Icons" under the "Notification Area" tab, Volume, Network, and Power are greyed out, then visit Paul's Forum and run his fixing program. reminds us that, if other icons disappear for good and never reappear, we should check first whether the programs are started at all.
The defect shows up when you don't have any icons set for hiding.
About the weirdest and totally wrong recommendation I have seen was to switch off your computer and let it sit without power for three hours. The web has a lot of snake oil, particularly in relation to the problem of the disappearing systray icons.
Then there is the fact that some change solves the problem, just by changing the boot and logon process sequence or timing a little bit.
Thus I receive hundreds of emails, detailing ever more different solutions to the problem, each of which has been tried and worked on one computer.
We have to suspect that each of these many solutions works only on a few computers.