Microsoft KB Archive/323196

= BUG: Visual Studio .NET Application Performance Slows Down After You Install .NET Framework Service Pack 1 =

Article ID: 323196

Article Last Modified on 9/27/2004

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APPLIES TO

 Microsoft .NET Framework 1.0, when used with:  Microsoft Windows 98 Standard Edition

 Microsoft Windows 98 Second Edition

 Microsoft Windows Millennium Edition 

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This article was previously published under Q323196

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SYMPTOMS
After you install Service Pack 1 for the .NET Framework on a computer that is running Windows 95, Windows 98, or Windows Millennium Edition, Microsoft Visual Studio .NET applications appear to run more slowly. Additionally, you may notice that Visual Studio .NET graphical applications (Windows forms) take more time to open.

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CAUSE
This behavior occurs when you do not restart the computer after you install .NET Framework Service Pack 1. You cannot log off and then log on after you install the service pack; you must restart the computer.

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RESOLUTION
Close all applications, and then reinstall .NET Framework Service Pack 1. When the installation is completed, restart the computer.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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MORE INFORMATION
If a .NET-based application is running when you install .NET Framework Service Pack 1, you must restart the computer for the changes to take effect. If you log off and then log on, the native images are rendered invalid with the common language runtime so that just-in-time (JIT) compilation is used exclusively. This behavior slows down performance.

Additional query words: poor performance degradation

Keywords: kbbug kbpending KB323196

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