Windows 8.1 clean install

Hello, I have a X1 Carbon 2014 that came with a Windows 8.1 Pro OEM license. I'd like to do a clean install to get rid of the Lenovo bloatware and partitioning scheme. I have two questions:
1) Where do I get the Microsoft official ISO installation disc?
2) Do I need a product key to use during installation? I heard Windows 8 keys are now embedded in the BIOS somehow.
Thanks in advance
Solved!
Go to Solution.

Good day.
1- Unlike Win7, there are no download links for Win8/8.1, per MS's restrictions. There are methods for obtaining an installable Win8.1 image(?) from a working Win8 installation, but I have no experience with that process.
2- Since your Gen2 Carbon came with OEM Win8.1Pro, the key is embedded in the UEFI/BIOS (MS OA3.0), and should be picked up during installation as long as versions match: std for std, or pro for pro.
Regards.
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My hardware: TP x120e 0596-2ru. Windows 7, sp1, 64Bit, English, installed in UEFI mode.

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Windows 8.1 clean install

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