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As noted here

Windows 8.1 fresh install with Windows 8 licence

Windows 8.1 has available "generic keys" that will let you install Windows 8.1, but not activate. Does Windows 8 have similar keys, that let you install but not activate?

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marked as duplicate by Ƭᴇcʜιᴇ007, magicandre1981, Indrek, Heptite, Mokubai May 5 '14 at 13:05

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1  
Yes. These keys do indeed exist. 46V6N-VCBYR-KT9KT-6Y4YF-QGJYH for Windows 8 and V7C3N-3W6CM-PDKR2-KW8DQ-RJMRD for Windows 8.0 Profesional – Ramhound May 3 '14 at 20:45
    
@StevenPenny - The source is my own research 8 months ago. I just created a text file which contains the the information if I ever required it. Although the keys are different I found this which lists same 8.1 keys I have archived. Although the keys are "different" their keys are also untested (unlike mine) – Ramhound May 3 '14 at 20:47
    
@Knuckle-Dragger those dont work with the retail version – Steven Penny May 4 '14 at 2:22
up vote 7 down vote accepted

Retail

Windows 8

FB4WR-32NVD-4RW79-XQFWH-CYQG3

Retail Windows 8 Professional

XKY4K-2NRWR-8F6P2-448RF-CRYQH

Source

OEM

Windows 8

46V6N-VCBYR-KT9KT-6Y4YF-QGJYH

OEM Windows 8 Professional

V7C3N-3W6CM-PDKR2-KW8DQ-RJMRD

Source

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The keys I provided are not OEM generic keys – Ramhound May 3 '14 at 23:21
    
@StevenPenny - I have used them personally and went on to use both System Builder and Upgrade licenses both on physical and virtual machines. – Ramhound May 4 '14 at 1:02
    
@Ramhound no. Using the Windows 8 here, your keys do not work. windows.microsoft.com/en-us/windows-8/upgrade-product-key-on‌​ly – Steven Penny May 4 '14 at 1:04

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