The date in CMOS is wrong so the cached icons aren't in date and the frozen icons are far enough out of date that they need to be refreshed - if you freeze the machine before the whole system has a chance to start up and refresh the icons then they'll go out of date. Hello i have a problem with my system tray, there is one icon that is missing. The system tray is a little section on the Taskbar where system icons such as the speaker, network, and action center icons appear. The Registry values mentioned above represent the notification area icon cache which stores the tray icons for all apps. These options have moved in Windows 10. When a notification balloon is displayed, the icon becomes temporarily visible, but even then a … any help please ? Changing system tray icons. The Registry values mentioned above represent the notification area icon cache which stores the tray icons for all apps. Fix corrupted Windows system tray icons – Registry method. In Windows 7 and 8, you could customize icons in the “system tray” to permanently show on the taskbar, or hide them away in the pop-up drawer. Any app that wants to can add an icon to the system tray and you can access said app from this icon. To change the volume icon you must modify the file SndVolSSO.dll found in C:\Windows\system32. Here is the registry editor method on how to clear system tray cache in Windows. Only the user is allowed to choose which notification icons appear on the taskbar. Hello all, When i click on the icons located on the system tray (Battery, Wifi, sound volume, notification, and time). 67399 System Tray issue in Customization. Since system tray icons are embedded in the system .dll files, you will need to read these files, change ownership to allow editing and then change those icons. This should fix both problems - of System tray icons getting disabled as well as the problem of the notification area accumulating unwanted icons. If this cache is corrupted, it may also prevent system icons from appearing in the tray. From your Windows account, open the registry editor by going to Start Menu > Run > and then typing “regedit”. Here are the locations of the system tray icons .dll files. Of course since it’s Windows 10, Microsoft doesn’t keep this space to itself. nothing happens. Next, you can just reboot the system, but Microsoft recommends killing the explorer.exe process and then re-launching it. Close Registry Editor and restart Windows. The reason that you're losing icons when the battery on CMOS dies and when you freeze PCs is because the icons have a cached "life". All notification icons are now hidden by default and that visibility cannot be programmatically controlled.