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When you resume your computer from standby or from hibernation after you switch user accounts, the Volume icon in the notification area may be displayed incorrectly. Specifically, the icon may have a thick black outline. This problem may also occur with other icons in the notification area, such as the Windows Product Activation icon. This problem occurs in a user session other than the current session.
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack
To work around this problem, remove the Volume icon from the notification area, and then restore it. To do this, follow these steps:
Right-click the Volume icon, and then click Adjust Audio Properties.
In the Sounds and Audio Devices Properties dialog box, click to clear the Place volume icon in the taskbar check box, and then click Apply.
Click to select the Place volume icon in the taskbar check box, and then click Apply.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article. This problem was first corrected in Microsoft Windows XP Service Pack 2.Microsoft is researching this problem and will post more information in this article when the information becomes available.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the Standard Terminology That Is Used to Describe Microsoft Software Updates