have you actually made sure the slic 2.1 is present using Slic Dump Tool by Davidxxw, and installed the certificate cos somthing must be a miss, because thousands of machines would be non genuine if that key is blocked, and im sure you would see a few more posts here with people panicing
Well, I don't want to us a loader as I will be selling this laptop. Can you confirm that this key is indeed blocked? I would rather use a different key or version than a loader or activator.
Why wouldn't you use the key on your COA? I don't know whether the key you used has been blocked. You can always use Daz's loader and have a matched certificate and key loaded. The loader will simply install the cert. and key just as you would manually.
What people are trying (or should be trying) to tell you is 'Install the freaking certificate !!!', after that you should be OK Without a certificate the key is useless, OA 2.1 = ACPI SLIC + Certificate + OEM:SLP Key, if one of these is missing, activation will fail
second this. I met similar problem as OP did before, but after install certificate, the problem was solved. So no panic yet people.