Log into Dell Digital Locker (DDL), Navigate to the DDL entitlements page.
NOTE: If you are having trouble logging into DDL see this article
How to access your Dell Digital Locker
The screen should look like this:
Select one of the entitlements (Order Numbers)
Select the Available Downloads tab
You will see a list of downloads.
NOTE: Even though this box is out of support, the first item on this list is the cert upgrade script that is available for download.
Customers that do not have current support that chose the software upgrade option will have access to download specific versions of OS10.
To find 10.4.3.6, you will need to scroll through the 15 screens. Alternately, at the bottom-right select “75 per page”, then you only need to scroll through two pages. You can eventually find the releases available to download on the second set of 75 downloads.