To fix the issue, Microsoft delivered a link to download a client from October 2014.It's taken almost two weeks, but Microsoft has now delivered a fully fixed Endpoint Protection client.
If you have a support contract with them - I really suggest you contact them instead.
We previously installed the SCEP 2012 client on the devices in our test collection.
The Create Automatic Deployment Rule Wizard starts.
Enter a Name for the rule and then choose a collection (I have used my test collection).
You will need to remove any group policies that may have been configured to disable Windows Defender on domain machines.