| Details | |
| Product: | Internet Security and Acceleration Server |
| Event ID: | 21158 |
| Source: | Microsoft Firewall |
| Version: | 4.0.3443.594 |
| Component: | ISA Server Services |
| Message: | The attempt to write the last date a daily summary was generated failed. A daily summary may be regenerated. Use the source location %2 to report the failure. |
| Explanation | |
| For each daily summary, the last date included in the summary is recorded in the registry. ISA Server was unable to store this information in the registry. As a result, this summary might be generated again. This failure may occur if the registry on the ISA Server computer is corrupted or when there is not enough memory available on the ISA Server computer for the ISA Server Report Generator to write the summary. |
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| User Action | |
| Close other programs that are running. Use the Task Manager to check programs and processes that are using large amounts of system resources.Try to restore the most recent registry backup.Try reinstalling ISA Server (choose the Repair option in Setup). | |