When opening Excel file it would show security warning. I did already disabled add-ins

Solve my problem please! Do not send me AI generated messages, I need a human to fix my issue. Problem Definition: Excel is consistently blocking active content and external links on all files — including brand‑new blank workbooks — even after a full Windows 11 restore and a complete Office 365 reinstall. The behaviour is identical across clean environments, with no add‑ins, no policies, no customisations, and no external influences. The same error message appears every time, regardless of file location, trust settings, or user profile. This indicates a deeper underlying fault in the Office security subsystem that standard troubleshooting cannot resolve.

Summary of Work Already Completed: I have spent 5 hours troubleshooting this issue myself (with Copilot assistance), followed by an additional 2 hours with Office 365 support. The issue remains unresolved. The following steps have already been completed, many of them multiple times:

Full Microsoft 365 uninstall using SaRA

Full Windows 11 recovery/reset

Full reinstall of Microsoft 365 on a clean OS

Excel Safe Mode testing

Clearing both XLSTART folders

Removing all add‑ins

Resetting the Excel profile

Deleting and rebuilding relevant registry keys

Running Excel with /regserver

Clearing the Office File Cache

Disabling Controlled Folder Access

Verifying no Group Policies or security baselines are applied

Testing with brand‑new blank workbooks

Testing with files in multiple local paths, including Public Documents

Checking file zone identifiers and “Unblock” flags

Resetting OneDrive/SharePoint sync

Performing Quick Repair and Online Repair

Creating and testing with a brand‑new Windows user profile

Repeating all Trust Center and Protected View configurations

Verifying no external COM or ActiveX components are loading

Despite all of the above, the issue persists exactly the same way, even on a completely clean Windows installation with a completely clean Office installation.

Request: Given that the problem survives full OS and Office reinstalls, multiple profiles, and all standard troubleshooting, this issue clearly requires escalation beyond first‑line support. I am requesting review by a higher‑level engineering team, as the behaviour suggests a deeper fault in the Office security model, trust subsystem, or underlying COM/ActiveX registration that is not being reset by normal repair processes.

do NOT send me an AI generated message, escalet this to a human

You repeatedly give me the same advice, my problem DOES NOT get Resolved. Pleasae escalate this to an Engineer, and not an AI agent!

Hi, I'm at the end of my tether, can someone please assit me, see my issue summary below:

Problem Definition: Excel is consistently blocking active content and external links on all files — including brand‑new blank workbooks — even after a full Windows 11 restore and a complete Office 365 reinstall. The behaviour is identical across clean environments, with no add‑ins, no policies, no customisations, and no external influences. The same error message appears every time, regardless of file location, trust settings, or user profile. This indicates a deeper underlying fault in the Office security subsystem that standard troubleshooting cannot resolve.

Summary of Work Already Completed: I have spent 5 hours troubleshooting this issue myself (with Copilot assistance), followed by an additional 2 hours with Office 365 support. The issue remains unresolved. The following steps have already been completed, many of them multiple times:

Full Microsoft 365 uninstall using SaRA

Full Windows 11 recovery/reset

Full reinstall of Microsoft 365 on a clean OS

Excel Safe Mode testing

Clearing both XLSTART folders

Removing all add‑ins

Resetting the Excel profile

Deleting and rebuilding relevant registry keys

Running Excel with /regserver

Clearing the Office File Cache

Disabling Controlled Folder Access

Verifying no Group Policies or security baselines are applied

Testing with brand‑new blank workbooks

Testing with files in multiple local paths, including Public Documents

Checking file zone identifiers and “Unblock” flags

Resetting OneDrive/SharePoint sync

Performing Quick Repair and Online Repair

Creating and testing with a brand‑new Windows user profile

Repeating all Trust Center and Protected View configurations

Verifying no external COM or ActiveX components are loading

Despite all of the above, the issue persists exactly the same way, even on a completely clean Windows installation with a completely clean Office installation.

Request: Given that the problem survives full OS and Office reinstalls, multiple profiles, and all standard troubleshooting, this issue clearly requires escalation beyond first‑line support. I am requesting review by a higher‑level engineering team, as the behaviour suggests a deeper fault in the Office security model, trust subsystem, or underlying COM/ActiveX registration that is not being reset by normal repair processes.

Thank you for escalating this case appropriately.

The security warning bar in the screenshot is Excel’s protection for active content (such as macros, ActiveX, external links). To remove the warning for a specific workbook, the workbook must be made trusted.

For a workbook that shows the warning:

1. Open the workbook.
2. In the yellow Security Warning bar, select Enable Content.
3. In the Security Warning dialog, select Yes to make the document a trusted document.

After this, macros/links in that workbook are enabled and the warning bar will no longer appear for that file. If the warning appears again for many files and all previously trusted documents should be cleared or reconfigured, use the Trusted Documents settings in the Trust Center to manage them.

References:

• Enable or disable macros in Microsoft 365 files
• Trusted documents