Reinstalling Windows after enabling eDrive

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Hi all so I have a samsung 840 EVO (256GB) and I enabled eDrive encryption using this guide:

 

https://superuser.com/questions/692172/how-do-i-encrypt-a-samsung-evo-840-ssd

 

Everything worked fine, no problems whatsoever.

 

Now my Windows 8.1 install is getting kind of old and I need to reinstall.

 

How would I go about reinstalling Windows 8.1 on a eDrive enabled drive in order to still benefit from eDrive after reinstall?

 

I did try to follow this guide:

 

http://forums.anandtech.com/showthread.php?t=2366848

 

but the "encryption reset" software is telling me all my drives are not TCG Opal encrypted, which makes sense considering the drive is encrypted through eDrive and not TCG Opal, but how did the guy manage to in the thread?