Article ID: 930369 - Last Review: March 15, 2007 - Revision: 1.4

Error message when you try to upgrade from Windows XP to Windows Vista: "You must first uninstall Sonic DLA"

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SYMPTOMS

When you try to upgrade a computer from Microsoft Windows XP to Windows Vista, you receive the following error message in the compatibility report, and you cannot upgrade Windows:

You must first uninstall Sonic DLA

Note This problem occurs even though you do not have Sonic DLA installed. This problem also occurs even though Sonic DLA does not appear when you double-click the Add or Remove Programs item in Control Panel.

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CAUSE

This problem occurs because IBM DLA is installed.

Note Sonic DLA has been renamed "IBM DLA." IBM DLA is incompatible with Windows Vista.

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RESOLUTION

To resolve this problem in Windows XP, uninstall IBM DLA. To do this, follow these steps:

Click Start, and then click Control Panel.
In Control Panel, double-click Add or Remove Programs.
In the Currently installed programs list, click IBM DLA, and then click Remove.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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