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Then I had problems with BitLocker because the partition order wasn't correct and the recovery partition wasn't correct. So then I started looking for utilities to find the OEM key that is burned into the Surface Pro 3 - and that key wouldn't work because it is a Windows 8 key. What happened afterwards was that no matter what I did, I couldn't activate Windows. I deleted the partitions and had Windows 10 create new ones (including the recovery partition). I had Windows 10 running and I decided that I wanted to wipe everything and load from scratch. What I did was exactly what you are proposing. Here is the article: No more Windows 10 keys for Insiders post-RTM installs must be on previously activated PCs It appears that Microsoft changed the licensing policy and I read the article and thought - this doesn't apply to me. I just spent the entire weekend recovering this. Also, is there anything else that I should be aware of? Finally, is there any way to identity which of the recovery partitions belongs to Windows 10? If I clear my C drive as mentioned, I understand that it will create a recovery partition on it's own. I have my product key handy and created a bootable USB of type FAT32 with a win10 installer created from the Windows Media Creation Tool. What I have decided to do is to clear my entire C drive which means removing all the partitions and reinstalling windows 10. I also found a bunch of folders hidden in my C drive which are related to the upgrade to windows 10 which I don't think are needed anymore.
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I have a healthy EFI System Partition of another 200MB and then what's left of my C drive (around 54GB).
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After through disk manager, I have found that I have 2 Healthy Recovery Partitions (one which takes 360MB and another taking 5,27GB. I have upgraded my Surface Pro 3 to Windows 10 and found that I am very low on storage space.
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