Fix disappearing system tray icons

Type regedit in windows search, and press Enter to open the Registry Editor.

Navigate to and select HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify

Delete both IconStreams and PastIconStream in the right pane.

Right click your taskbar and select Start Task Manager.

Select the Processes tab, choose explorer.exe, and click End Process.

Now in task manager click File, click New Task (Run...), enter explorer.exe, and press Enter.

Your icons should reappear.