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If the Microsoft iSCSI Initiator Service will not start and reports “Access is denied” (Error 5), check the System event log’s permissions and the policies that manage them—especially recent Event Forwarding changes. One Windows Server administrator reported resolving the same symptom by restoring the System Event Log’s rights after an Event Forwarding configuration changed them. That is a useful lead, not a guaranteed fix: Error 5 alone does not identify the permission or policy responsible.
First confirm what failed
Before changing permissions, record the exact service error, the time it occurred, and any matching Service Control Manager entry in the System log. A Microsoft Q&A report matching this symptom described event ID 7023 and intermittent failures after reboots on Windows Server 2022 and Windows 11. Check your own event details rather than assuming the same event ID or cause applies.
The report’s author later marked the issue solved, writing, “It was due to wrong rights on the System Eventlog.” The author said the rights had been changed while enabling Event Forwarding and that restoring them to their defaults let the service start. This is a community-reported resolution, not an official Microsoft diagnosis for every iSCSI Error 5 case. Read the reported case on Microsoft Q&A.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsCheck Event Forwarding and effective policy
If the failure began after an Event Forwarding rollout, Group Policy change, or organizational policy update, review those changes first. The Q&A discussion includes a report that an Event Forwarding policy set event log access; one commenter said moving a server out of the OU with that policy resolved their case. This does not establish that the same policy is responsible in your environment.
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- Review recent changes. Identify Event Forwarding setup, computer-policy edits, OU moves, and other changes made shortly before the first failure.
- Inspect the effective computer policy. On a managed server, ask the administrator responsible for Group Policy to check which policies apply and whether any define event log access. Focus on the System log and the settings governing its permissions.
- Compare the resulting permissions. Compare the System log’s effective access with a known-good system running the same Windows version under the same organizational policy. Do not copy an SDDL or permission set from another machine without confirming that its principals and requirements match.
- Make and verify one controlled change. Use your organization’s change process to correct a confirmed policy or permission issue, then retry service startup and check the resulting event log entries.
Microsoft documents that event log permissions can produce Error 5 in other service-related scenarios. Its Task Scheduler guidance describes checking the System log’s security descriptor and querying the log with wevtutil get-log "SYSTEM". That guidance is useful context for inspecting log access, but it is not an iSCSI-specific repair procedure and does not establish that the iSCSI service has the same account or failure mechanism. See Microsoft’s Task Scheduler troubleshooting guidance.
Microsoft also documents a separate example in which the Configure log access Group Policy prevents a service account from writing to an event log and leads to Error 5. That article concerns SQL Server Agent and the Application log; treat it as evidence that log-access policy can affect services, not as an iSCSI policy recipe. See the SQL Server Agent example.
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Separate permission errors from device or recovery problems
Use the observed symptom to choose the right branch:
| What you observe | What to investigate | How it relates to Error 5 |
|---|---|---|
| The service fails to start with “Access is denied,” possibly with a Service Control Manager event such as 7023. | System event log permissions, Event Forwarding changes, and effective event log access policy. | This matches the reported failure and its reported resolution, but the cause must be confirmed on your system. |
| The iSCSI initiator device is absent or appears as an unknown device while carrying out an Azure Backup recovery task. | Device Manager and the relevant driver/device recovery steps in Microsoft’s Azure Backup guidance. | This is a different scenario; device checks are not documented as a fix for Error 5 caused by log permissions. |
For the Azure Backup recovery scenario, Microsoft says to check Device Manager for the Microsoft iSCSI Initiator or an unknown device with hardware ID ROOTISCSIPRT, update the driver if needed, restart the Microsoft iSCSI Initiator Service, and retry recovery. Follow those steps when the device or recovery workflow is the issue, rather than treating them as a general Error 5 remedy. See Microsoft’s Azure Backup recovery troubleshooting steps.
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Consider other recent changes without assuming a cause
A commenter in the Q&A thread suspected antivirus software might block svchost.exe -k netsvcs -p, but said they had not isolated antivirus from the Group Policy change. The thread therefore does not establish antivirus as the cause. If security software changes coincide with the failure, work with your security administrator to investigate them through an approved process, changing one factor at a time rather than broadly disabling protection.
What Error 5 does—and does not—tell you
“Access is denied” confirms that an access check failed; it does not, by itself, identify the denied resource, the effective policy, or the account involved. The strongest directly matching lead in the available case is altered System Event Log rights associated with Event Forwarding. Microsoft’s adjacent documentation shows that event log access policy can cause Error 5 in other contexts, but there is no dedicated Microsoft procedure here establishing that same mechanism for iSCSI startup.
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