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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What happens to the Windows 7 key when upgrading to Windows 8? [closed]

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, ...
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6answers
46k views

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 ...
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5answers
67k views

Windows 7 product key does not work on Windows 10

I just did a fresh Window 10 installation from .iso files on the computer I was running Windows 7 on before. I have the original Windows 7 DVD's, with a valid key that I was using before. Now I tried ...
5
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1answer
17k 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 ...
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2answers
35k 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 ...
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5answers
168k 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 ...
15
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1answer
69k 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 ...
14
votes
3answers
32k 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. ...
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3answers
16k views

Determine which software product a Microsoft Product Key activates

Without a product key being labelled, is there is any way to identify what Microsoft software product a given product key is meant to activate? Let's say for example I had the product key ABCDE-...
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2answers
5k views

Is it safe that everybody can see the Windows product ID?

Is it safe that everybody can see the Windows product ID? What is my CD key given the product ID?
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5answers
40k 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 ...
3
votes
1answer
7k views

Downgrade from Windows 7 Ultimate to Home Premium?

A few months ago, I acquired a Windows 7 Ultimate product key and updated from Home Premium to Ultimate. Well, now I get the "This copy of Windows is not genuine" message. I have the Home Premium ...
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votes
2answers
5k views

Does Windows 8 RETAIL install extract OEM product key from BIOS?

I am in a situation where I cannot use Magical Jelly Bean Product Key Finder since the hard drive has failed on a particular system from HP. Sadly HP will only sell restore discs and I don't have the ...
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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 ...
1
vote
1answer
25k views

Windows 8 placeholder keys [duplicate]

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, ...
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votes
4answers
34k views

How to get windows 7 cd key from command prompt or linux live disk?

Recently my windows 7 installation broke and refuse to boot (see here). I wish to reinstall but only have 1 cd key. Is there a way to retrieve my current cd key with the use of only command prompt ...
2
votes
1answer
135 views

How do I tell if a Windows 8.1 Product Keys is an OEM key?

My system has been upgraded multiple times. Latest was upgraded to Windows 8.1 Pro with media center. I would like to move the license. But I am not sure if I have still have an OEM Licensed ...
2
votes
2answers
18k 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 ...
2
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1answer
3k 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 ...
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5answers
3k views

Unable to upgrade Windows 10 edition from Home to Pro

I have a Lenovo laptop which upgraded from Windows 8.1 Home to Windows 10 Home. I have a (legitimate) Windows 10 Pro key which I ran through the "Change Product Key" wizard. After a reboot I get an ...
1
vote
2answers
9k views

8.1 to 10 setup : Something happened > Setup has failed to validate the product key

Just like millions of other users, I'm attempting to upgrade to windows 10. I have a Dell laptop running 8.1, which had windows reinstalled once. That was because I swapped the HDD out for a SSD and I ...
1
vote
1answer
82 views

Can I use windows 10 installation media that I made by Media Creation Tool to install in another computer

I have made bootable flash drive using Media Creation Tool (Windows 10 Single Language) from laptop that have activated Windows 8 to use it for upgrade or clean install later. my question is: can I ...
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2answers
2k views

MS-Office 2010 Professional Plus - Change Product Key error

I installed MS-Office 2010 Professional Plus 1 month ago. But now it is giving error when I open any of its product like Outlook, Word, Excel etc. Please help me what can I do for that? I do not ...