We’re rolling out a new version of Internet Explorer for a customer. They were on IE6…
The error about is actually generated by a Windows feature called the "Attachment Manager".
It seems I had gotten two things wrong.
- failed to configure the corporate internet address as being in the "Intranet" zone.
- failed to configure the Attachment Manager at all.
So about that Attachment Manager.
The group policy to configure Attachment Manager can be found in System.Adm.
I created a Attachment Manager only ADM file, which you can download here.
Some reference articles:
Description of how the Attachment Manager works in Microsoft Windows
How To Configure Trusted Sites In Internet Explorer For A Group Policy
Why don’t the file timestamps on an extracted file match the ones stored in the ZIP file?