■ ASP 無法執行,發生HTTP 500錯誤

伺服器無法載入應用程式'/LM/W3SVC/1/ROOT'。錯誤為 '發生一般性存取被拒的錯誤'。
Description: The server failed to load the application "/lm/w3svc/1/root"

1.如果你剛好有安裝Visual Studio 6 sp6
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問題發生原因
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安裝Visual Studio SP6後引起的ASP無法執行， ASP運行後出現500 - internal error

This problem occurs because the Visual Studio 6.0 SP6 Setup program removes the Everyone group from the list of authorized users and groups for the Mfc42.dll file.

Microsoft Internet Information Services (IIS) uses the IWAM_ComputerName user account to start out-of-process applications. However, because the Visual Studio Setup program has removed the Everyone group from the list of authorized users and groups for the Mfc42.dll file, the IWAM_ComputerName user account no longer has the Read & Execute permission for the Mfc42.dll file.

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解決方式
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找到 C:\winnt\system32\Mfc42.d

來源或出處 : http://support.microsoft.com/default.aspx?scid=KB;EN-US;842329