@the_scotsman: And sorry, it were my wrong, the 3V66T Key is the Pro Key and not the Enterprise Key, that is the 2YT43! Enterprise will be activated for 180days and need reactivation. If you've Enterprise installed, you could also use the MTK 2.5.3!!
I'm not sure what's going on. Months and months ago, I formatted and installed the first Win10 Tech preview. I have since then updated to each new build on the fast ring, all the way up to 10240. I was part of the Insider Program, and still am. I tried formatting tonight and clean installing 10240. I didn't enter a product key. I cannot activate as it says the key is blocked. Is this because I didn't install the first Win10 Tech preview months ago, as an upgrade to a Win7/Win8 activated install?
I had that problem, it activated immediately after I changed my PC name to how it was previously. I just went with express settings during install and they set the name to some gibberish.
I believe build 10162 was first build that saved MSA's that you need for activation, can you find a copy of that build anywhere, you probably will have to activate it with KMS for the time being until MS servers are back up, when they are, sign in to your MS account, verify it, make sure its activated thru MS account, upgrade, not clean install, to the ISO that with be on insiders page, after upgrade, don't format just clean install
On my Laptop, which run 10240 Pro, I used the 3V66T key and all works fine. And I used an Clean install after an Upgrade on my Laptop, no problems! I also had placed an PID.txt file in Sources Folder of the USB Flash Drive with that 3V66T key and after the clean install, Windows 10240 was automatically activated.
If you need why computers with Windows 8 have not COA The reason for this change is simple (it's security / anti piracy reason) . It is only with computers running on Windows 7 (I follow realize it when I bought my laptop windows 7); is that the license key stuck in the computer is not actually activated. The manufacturer (Dell / HP / Acer ...) uses a different activation key which is indicated on the COA. In reality you can in fact anyone is this is the reason why Microsoft remove windows 7 iso from its official website, is that anyone can use a product key windows 7 oem There before now he need a key box product version to download windows 7 iso on the official website of Microsoft. (i know because i have try this).
Yesterday i saw this quote from s1ave77, but i don't know if someone already tried it or gave any feedback and since i just did a clean install (without upgrade or anything else) i'll just leave this here: Did a clean install - activation required; Logged in with my MSA (insider account) and system was activated after a reboot; After that i did opt-out from insider and after another reboot the system remained activated; EDIT: Nevermind, it's not activated anymore EDIT2: I logged back in with my MSA and instead of opt-out again i changed from MSA account to local account. In slmgr -xpr it says "Notification mode" but in settings app there's no text indicating to activate the system and i can personalize it.