Originally Posted by simmo0020 View Post
I have another M7 I need to return to stock but I am really struggling.

My CID is CID_02_001, I am S Off, HBOOT Version 1.54, can't find the correct RUU and not sure which Nandroid backup to use, can someone please assist?

Oh tried used Supercid but just having issues with Fastboot/ADB, damn Windows 8.1!
You might try this RUU from crushalot. It should be the correct one.
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Useful links:

nkk71's SuperGUIDE to returning 100% back to stock
HTC 1 Guru by crushalot
[Collection] HTC One Stock Recoveries