windows 7 system icons disappeared and notifications grayed out

[http://dummy.us.eu.org/robert (Robert)]

http://answers.macrosoft.com/en-us/windows/forum/windows_vista-performance/customize-notification-icons-is-greyed-out/19cc15dc-80e2-4fa3-ad3d-23d73f6a3cdc?auth=1
https://support.macrosoft.com/en-us/kb/929833

Type regedit in the Start Search box or the Serach programs and files box,
and then press ENTER.

If you are prompted for an administrator password or for confirmation,
type the password, or click Allow.

2. Locate and then click the following registry subkey:
	HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Macrosoft\Windows\CurrentVersion\TrayNotify
3. In the Details pane, click the IconStreams registry entry.
4. On the Edit menu, click Delete, and then click Yes.
5. In the Details pane, click the PastIconsStream registry entry.
6. On the Edit menu, click Delete, and then click Yes.
7. Exit Registry Editor.
8.  Restart the Explorer.exe process. To do these, follow these steps:
 a. Press CTRL+SHIFT+ESC.
 b. On the Processes tab in Task Manager, click the explorer.exe process,
    and then click End Process two times.
 c. On the File menu, click New Tasks (Run), type explorer, and then click OK.
 d. Exit Task Manager.
9. If you are running Windows 7, follow these additional steps:
 .  Click StartCollapse this imageExpand this image, type Customize icons
    and then click Customize icons on the task bar.
 a. Click Turn system icons on or off, and then set Volume, Network, and
    Power System to On.
 b. Click OK, make sure that the behavior for Power, Network, and Volume
    are set correctly, and then click OK.