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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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 ...
17
votes
4answers
31k views

How to find Windows 8 product key?

Does anyone know of a tool for Windows 8 that works and gets the product key that was used to activate Windows 8? Bonus points for an updated algorithm to extract the product key from the registry ...
13
votes
3answers
2k 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 ...
12
votes
2answers
25k 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. ...
8
votes
1answer
15k 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, ...
7
votes
2answers
7k views

Can multiple Windows 7 Enterprise PCs use the same product key?

I have worked out that a company I am working for is using the same product key on all its computers. They are all Windows 7 Enterprise PCs. Is this legal for them to be doing this?
7
votes
3answers
2k views

Windows XP SP1 with invalid key, upgrade to Windows XP SP3 with valid key

I have a Windows XP Professional SP1 system with an illegal key (not mine). I need to get it to SP3 in order for it to handle the software I am trying to install; I have a valid key for Windows XP ...
6
votes
2answers
4k views

Difference between Product Key and Serial Number

I just wanted to extract my activation keys of Windows 7 and 8 x64. I used several programs to test, if they produce the right results. In System screen > Details about windows activation I can see ...
6
votes
1answer
4k views

Windows 8 product key from Dreamspark does not work

I recently downloaded Windows 8 Professional N 32/64 and got a product key from Dreamspark. However when I try to install Windows 8, it asks me for a product key. I enter it and it fails: The ...
5
votes
1answer
15k 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 ...
5
votes
1answer
25k views

Find the product key I entered for MS Office on Mac

I have several legal license keys for Office:mac 2008. I want to do a quick audit of the two machines I've installed office on and verify which license keys are being used where. But I don't see the ...
5
votes
1answer
11k 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
2answers
21k views

What happens after the trial period of Windows has expired? [duplicate]

Possible Duplicate: Windows 7 activation period I installed Windows 7 Home Premium 64-bit on my laptop a few days ago. Today I got a message in notification bar saying that I have 25 days ...
4
votes
1answer
316 views

Exchanging a brand new laptop because of a dead pixel, is there any way to re-validate my Microsoft Office product key?

I just bought a brand new laptop (Toshiba Satellite L655-S5155) and realized AFTER I had installed Norton 360 and Microsoft Office Home and Student 2010 that the monitor has a dead pixel. I'm ...
4
votes
1answer
9k 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 ...
4
votes
1answer
7k views

What edition of Windows is a CD key for?

Is there a source somewhere that can tell me what edition of Windows (i.e. Windows 7 Home Premium 64) a CD key from the sticker is for? Many systems come in with the edition name rubbed off, and I ...
4
votes
3answers
19k 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 ...
4
votes
1answer
2k views

Does Windows Impose a Performance Penalty For Not Activating Windows With a Product Key? [duplicate]

Possible Duplicate: Windows 7 activation period Does Windows 7 impose a performance penalty for not activating Windows with a Product Key? Let's say you have a very old installation of ...
3
votes
5answers
22k 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
3answers
47k views

Where can I download a rescue disk for Windows 8?

Where can I download a rescue disk for Windows 8? I have paid for Windows 8, but I would like to be able to download a Windows 8 repair disk using my product key. Is this possible?
3
votes
3answers
10k views

Office 2013 Trial Error 25004

I had some issues with getting an Office 2013 Professional Plus 2013 trial when I first installed it from TechNet, and I had to reinstall it. When I tried to activate it after reinstalling, I got the ...
2
votes
2answers
13k views

Determine if Windows 7 is 32 or 64 bit from the product key?

Unable to start Windows to determine whether the version of Windows 7 Home Premium is 32 or 64 bit. The product key is available. That is all I have. Looking to acquire re-installation media but ...
2
votes
3answers
2k views

Retail windows xp prof sp 2 Lost key but have the genuine cd , what to do?

I had recently formatted my system only to find out i have lost the cd key to my original cd. i had used the option to enter the product key later. Yes, i know its a stupid thing to do but i bought ...
2
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3answers
3k views

What is the right way to release a Windows 7 and/or 8 Product Key?

Assuming someone wants to release/liberate their Windows product key from a pc that they are going to sale, what is the right way to do it, so that the key can be used on the next system that is ...
2
votes
4answers
2k views

My Windows 7 suddenly said it wasn't genuine any longer

I have a laptop with Windows 7 as the OS. Suddenly today, the screen became black with a message stating "Build 7601, this copy of windows is not genuine." I got this laptop a few months ago from ...
2
votes
2answers
3k views

No COA provided with OEM version of Windows 7 that I purchased. What to do?

I bought a sealed copy of Windows 7 Home Premium 64 bit to install on a computer I am building. When I opened the package there was no Certificate of Authenticity (COA) or activation code. Is this ...
2
votes
2answers
11k 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
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 ...
2
votes
1answer
3k 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 ...
2
votes
4answers
1k views

planning to upgrade my computer (windows 8)

I recently bought windows 8 using the upgrade offer. Now I am planning to upgrade my computer ie , change the motherboard , processor and the Ram. I would like to know if i can use the same product ...
2
votes
1answer
9k views

Reinstalling Windows Xp Professional OEM

My aunt called me in to repair her desktop and laptop computers. (Level up! You become: The Family's Private IT.) The desktop wasn't much; just many, many junk pieces of software that her daughter ...
2
votes
1answer
1k views

Windows 7 product activation failed, but the previous activation code worked — is there anything to worry about?

Alright, so there was a few reasons that made me have to reinstall Windows 7 onto my machine. I am running on a Lenovo Ideapad Y480. When Windows 7 was reinstalled, it asked me for my product ...
2
votes
1answer
392 views

Finding Windows 7 Product Key Before Reinstall [duplicate]

I got drafted into repairing a friend's laptop. He got a virus and after removing it the laptop would no longer boot into Windows. After banging my head against the wall for several days I've finally ...
2
votes
1answer
892 views

Uninstalling Windows 8 pro and reinstalling it

I've recently installed Windows 8 Pro in the first partition and in the third partition there was Ubuntu 12.10. After the installation, I could not boot any other partition. So I decided to uninstall ...
2
votes
2answers
32k views

Check if Windows 7 product key has been used

Selling my Windows 7 as used to someone, however, I have lost track of whether the product key is still used on an old PC of mine. Is there any quick way to check whether a product key has been used ...
2
votes
0answers
3k views

Retrieve Windows 7 Product Key from Linux [duplicate]

My Windows 7 is corrupted and no way I can get this repair tool working. The good thing is that I can format and make a fresh install, the bad thing is I lost the product key (I have the DVD). Right ...
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 ...
1
vote
1answer
5k views

How to change the saved Office 2013 Product Key

I installed Office 2013 and put in the product key when it asked me to. After typing in the product key, it allowed me to use MS Word once. After I closed MS Word and went to reopen it the next day, ...
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vote
2answers
301 views

Install ONLY Media Center On 8.1 Laptop With 8.1 Pro ISO?

I have a Dell laptop that came with Windows 8.1. (I guess it's not an "update" since it came with 8.1 out of the box.) I just purchase a legitimate version of Windows 8.1 Pro (student) edition from ...
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vote
3answers
8k views

Where do I find my Windows 7 registration key if I lose the DVD?

I lost my Windows installation DVD. I don't remember the registration key for my Windows installation, and I want to get rid of the pop-ups stating that my Windows is not genuine. I learned that the ...
1
vote
3answers
1k views

Determine if product key is used on multiple computers

I'm the sole programmer at company. Not only that, I'm the sole person who's remotely computer literate above the "I can check my email". As such, I've been asked to go to all the machines, and ...
1
vote
1answer
150 views

Booting multiple Windows 7 from same image and then applying correct CD key

I'm planning to connect 21 Windows 7 computers (OEM) to a central server with iSCSI, and then boot all computers from the same "image". The problem is the CD key. I have 21 valid OEM keys with valid ...
1
vote
1answer
1k views

VirtualBox: Windows 7 says it's not genuine

I've set up a Windows 7 guest machine under Windows 7 using oracle virtualbox 4.2. This Windows Guest has its own product key which corresponds to the boxed set I purchased for the sole purpose of ...
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vote
1answer
1k views

How many Product Keys do I need for Windows 8? one or more?

I came to know that many people buying more than one product key for Windows 8. What's the use of getting more Keys? Suppose If I purchase only one product key, OS available for limited time or Life ...
1
vote
1answer
10k views

Any way to recover a lost Office 2010 product key purchased through HUP?

A year ago, I had an internship with Medtronic, where they sold Office 2010 for $10 through the Microsoft Home Use Program (HUP). I downloaded the install file and they sent the product key to my ...
1
vote
1answer
197 views

reinstall and XP downgrade rights

I have to reinstall a system that originally (at time of purchase) exercised the XP downgrade right. But the COA sticker only has a product key for Vista Business. What key should I use to ...
1
vote
1answer
48 views

Can I use same MS product code to replace Win7 with Ubuntu-host+Win7-guest?

My new laptop came with Windows 7 Home Premium pre-installed. Ubuntu would have been my preference, but only as long as I could keep a Windows 7 VirtualBox around to get me through those occasional ...
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2answers
2k 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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vote
1answer
96 views

D630 laptop comes with Windows XP, but has a sticker for Vista on the bottom with a key

I'm thinking they didn't like the Vista, or something like that. Can I use that product key on the bottom of my laptop to install Windows Vista, since it may have been installed before? Why would ...
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1answer
705 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 ...