Windows Defender and Windows AntiSpyware (Beta) do not run correctly when you install Windows Defender on a computer where Windows AntiSpyware (Beta) is already installed

Article ID: 925559 - View products that this article applies to.
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SYMPTOMS

When you install Microsoft Windows Defender on a computer where Microsoft Windows Antispyware (Beta) is also installed, neither product runs correctly.
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CAUSE

This problem occurs because Setup installs Windows Defender files in the same folder where Windows Antispyware (Beta) files are already installed.
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RESOLUTION

To resolve this problem, uninstall Windows Antispyware (Beta) before you install Windows Defender.
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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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Properties

Article ID: 925559 - Last Review: September 28, 2011 - Revision: 3.0
APPLIES TO
  • Windows Defender
Keywords: 
kbdefenderrtwswept kbtshoot kbprb KB925559
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