A product key is a character sequence that acts as the license to a software product, and often required as proof of purchase. Also sometimes known as serial number.

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How to find Windows 8 product key?

Does anyone know of a way to get the product key that was used to activate Windows 8? Bonus points for an updated algorithm to extract the product key from the registry key. While I realize this ...
8
votes
1answer
16k views

What happens to the Windows 7 key when upgrading to Windows 8?

Microsoft is offering "Microsoft Windows 8 Professional Upgrade" at a discounted price compared to the OEM version. However it states: If you currently have a personal computer running Windows 7, ...
5
votes
1answer
12k views

Installing a different edition of Windows 8 on an OEM system

My PC comes with an OEM copy of Windows 8 (regular), but I only have a Windows 8 Professional DVD. Will Windows 8 automatically detect the edition associated with the product key in my BIOS and ...
4
votes
1answer
12k views

Is there a way to establish what version a Windows 7 product key is?

I have a Windows 7 product key that I foolishly did not label. Rather than downloading and creating disks for however many different ISOs exist (Basic, Pro, Ultimate, 32-bit/64-bit, upgrade, full ...
27
votes
5answers
106k views

Install Windows 8 without a Product Key

Windows 8 setup asks for the product key at the beginning of the setup without letting you install it. I got the Windows 8 ISO from MSDN but I didn't get enough keys to install it on all my 7 ...
8
votes
1answer
25k views

How do I retrieve a product key from another hard drive?

My friend's laptop motherboard died and he needs his Windows 7 product key from the hard drive (which is still working). I connected the old drive as a secondary drive to my own computer and tried ...
3
votes
5answers
26k views

How to recover Windows Vista product key?

Two years ago I bought an Asus laptop with Windows Vista pre-installed. I also received a recovery DVD with it. I now want to reinstall Windows and fully format the hard drive - however, the sticker ...
13
votes
3answers
27k views

Change the Windows 8 product key after installation?

I just completed a fresh install of Windows 8 Pro as it was released to MSDN. Installation went without a hitch however I can't find out where to enter the correct product key for the copy I have. ...
2
votes
1answer
2k views

Windows 7 product key is blocked by activation server

I bought Windows 7 Ultimate from eBay around 8 months back. I got original Microsoft DVDs (for 32 and 64 bit) product sheet. To verify the genuinness, I activated the windows immediately after ...
1
vote
1answer
862 views

How to get Windows 7 Product Key from old mac harddrive

I don't know if I am going to get an answer or if this is possible but here goes. On my old macbook pro, running Snow Leopard, I installed Windows 7 with bootcamp. The logic board crapped out on me ...
1
vote
3answers
5k views

Recover Vista install key from non-booting OS drive

A friend's Vista-based computer won't boot, so I am just going to format and reinstall. The problem is that she never kept her product key for Vista. Is there any way to recover that key from ...
2
votes
2answers
13k views

Windows product key is valid but wont activate

Last month, I needed to install Windows XP (Pro Version 2002 SP3) from a Reinstallation CD a co-worker gave me, and with a product key the IT team told me to use. Everything installed successfully ...