There are days when I don’t want to see the System Tray in Vista especially when a lot of applications have littered on it. You can hide the system tray in the Vista Registry through the following steps:
1. Click on Start Orb
2. Type Regedit.exe on the search box
3. Go to the path: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
4. Create a new 32-bit DWORD value in the right hand pane with the following values:
Name: NoTrayItemsDisplay
Value: 1
5. Log-off from Windows Vista
6. Log-in again

Will this affect all users?
Reply
Jack, sience the registry used is HKEY_CURRENT_USER, only should affect the current usser
Reply
now how would you put it back on if you were ready to use it agian
Reply
u have to simply delete that register that u have made
Reply