I install windows 8 without knowing a product key

Are you facing any issue?

Are you seeing Windows Activation error?

Does your Windows come with Windows 8?

Normally, the product key is imbedded into the BIOS/UEFI and when you install Windows , it will retrieve the product key without asking you.

In case your Windows is activated , then you don't have to be worry.

I installed windows 8 without knowing a product key, i dont know how to fix this. And if i cancelled it my drive was locked. I want to get back i dont know how. I try to system restore or repair your pc but it didn't work And ill try to find product key using cmd in troubleshoot but its not working. Please help me guys. Im sorry If im not good in english. Thqnk you guys

Is this a reinstall of Windows 8, or did you decided to install it yourself?

What came preinstalled on your machine?

There are no downloads for Windows 8, only Windows 8.1.

If 8 was preinstalled:

With Windows 8/8.1 The Product Key on preinstalled Operating Systems (HP, Acer, etc) is embedded in the BIOS in the Motherboard, so that the lost and/or worn C.O.A. Sticker problem is no more.

When you reinstall it will pick up the Product Key and activate the system automatically.

If it does not or you have activation problems, follow these steps:

"How to Activate Windows 8 and 8.1 by Phone"

http://www.eightforums.com/tutorials/24636-activate-windows-8-phone.html

Follow these steps and do a Phone Activation and hold on for a real person to assist you.

To Activate Windows 8.1 by Phone

"Get help with activation errors"

http://windows.microsoft.com/en-us/windows-8/activation-errors

"How to activate a Microsoft product by using Microsoft Product Activation Center"

http://support.microsoft.com/kb/950929/en-us

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If phone activation is not available to you or does not let you contact Microsoft, you will have to use this method to contact MS support 

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This information may interest you if you do wish to keep a record of it:

"Windows 10 Embedded Product Key Tool"

https://neosmart.net/blog/2014/windows-10-embedded-product-key-tool/

"We’re proud to introduce the immediate release of our newest utility for Windows users: the NeoSmart Technologies Embedded Product Key Tool. Designed for users of Windows 7, Windows 8, and Windows 10, our embedded product key tool will retrieve and display the Windows setup product key embedded in the BIOS or EFI, allowing you to store it for safe-keeping or use it to reinstall Windows with an official Windows setup image."

You can also use:

"Belarc Advisor - Free Personal PC Audit (Version 8.5c)"

http://www.belarc.com/free_download.html