| Event Id | 21159 |
| Source | Microsoft ISA Server Web Proxy |
| Description | Web filters cannot be initialized, or updated changes cannot be applied. To resolve this error, Check recent changes made to Web filters configuration. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. |
| Event Information | The following microsoft article will give more information about this event. |
| Reference Links | The Microsoft Firewall service does not start and event ID 7024 is logged in the system event log of the computer that is running ISA Server 2004 |
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