The solution to the disappearance of the system volume icon in Lenovo notebook VISTA is as follows:
Run the registry and expand it in sequence Go to the following branch: HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run, right-click in the blank space on the right, select the "New String" value, then name it "Systray", and then double-click "Systray", enter "E:\\Windows\\System32\\systray.exe" in the blank space of the pop-up dialog box (do not enter double quotes when entering).
Note: There is a certain risk in registry operations. Please back up the registry before operation and operate according to the operating level.