What should I do if my win7 speaker disappears? Why is the volume icon missing?

The following methods are available in win7 after actual tests.

 

The Vista volume icon is gone, the Vista Network icon is gone, and the Vista power icon is gone. After using vista for a long time, there may be a situation where the volume icon, Network icon, or power icon is missing in the system bar in the lower right corner of the screen. At this time, even if you cannot restore it in the toolbar property-notification area, you will find that the options are gray and cannot be checked. In this case, you cannot even restart Vista. This situation may be particularly evident on computers with repeated sleep, such as laptops.

I search http://support.micro with the keyword "Vista volume icon"Soft.comThe solution is found. The cause of the problem is: when the system or application wants to put an icon in the notification area, the system or application sends a discrete communication message to the operating system "shell. If the operating system is very busy, the message may expire or time out. If a timeout occurs, the icon is not displayed in the notification area. This problem usually occurs when the system is started for the first time. During the first startup, the system is busy processing multiple startups, applications, and service initialization.

The volume icon of Vista solution disappears, the Vista Network icon disappears, and the Vista power icon disappears.

1. Click Start, type Regedit in the Start search box, and then press Enter. If the system prompts you to enter or confirm the administrator password, enter the password or click "allow ".

2. Locate and click the following registry subitem:
HKEY_CURRENT_USER \ Software \ Classes \ Local Settings \ Software \ Microsoft \ Windows \ CurrentVersion \ traypolicy

3. In the details pane, click the iconstreams registry key.
4. On the "edit" menu, click "delete", and then click "yes ".
5. In the details pane, click the pasticonsstream registry key.
6. On the "edit" menu, click "delete", and then click "yes ".
7. Exit the Registry Editor.
8. Restart or log out of the computer.