Microsoft KB Archive/931198

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Error message when you try to visit a Web page that is hosted on a computer that is running Internet Information Services 7.0: "HTTP Error 503. The service is unavailable"

Article ID: 931198

Article Last Modified on 2/22/2007


  • Microsoft Internet Information Services 7.0


When you try to visit a Web site that is hosted on a computer that is running Microsoft Internet Information Services 7.0, you receive the following error message:

HTTP Error 503. The service is unavailable.

Additionally, an error message that resembles the following is logged in the System event log:

Log Name: System
Source: Microsoft-Windows-WAS
Event ID: 5009
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: ComputerName
A process serving application pool 'DefaultAppPool' terminated unexpectedly. The process id was '432'. The process exit code was '0xfffffffe'.


This issue occurs when an empty folder from an earlier version of the Microsoft .NET Framework 2.0 is located in the %windir%\Microsoft.NET\Framework folder.

For example, you have an empty folder that is named v2.0.40727 or earlier that is located in the %windir%\Microsoft.NET\Framework folder. The computer is running IIS 7.0 and the original release version of the .NET Framework 2.0 (version 2.0.50727).


To resolve this issue, you must remove or rename the empty folder. If the folder is not empty, you must verify that a beta build of the .NET Framework 2.0 is not installed on the computer. To do this, follow these steps:

  1. Click Start[GRAPHIC: Start button], and then click Control Panel.
  2. In Control Panel, click Programs, and then click Programs and Features.
  3. Select the .NET Framework 2.0 Beta version, and then click Uninstall.

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