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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Getting error code 0xc004f210 when trying to activate Windows 10 with a Windows 8 product key

I have a Lenovo G580 laptop that came with pre-loaded Windows 8 on it. I did a fresh install to Windows 10 using the Microsoft Media Creation Tool and rebooted then the installer asked me for the ...
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5answers
71k views

How do I find which serial I used for Photoshop CS5 on my computer?

I want to move my Photoshop CS5 installation to a new computer. Unfortunately, I lost the paper with the cd-key. Is there a way to recover the serial from my local installation?
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1answer
42 views

Check Office product keys online [duplicate]

We have like 20 Office 2010 Product Key Boxes but we have no clue which one are used and which one are free. Is there any way to check which one are free?
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3answers
2k 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 ...
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2answers
5k views

Retrieving OEM-SLP key from OEM Recovery DVD

I have a number of HP ProDesk 600 G1. I use Windows Deployment Server (WDS) to deploy a custom image to these machines (effectively removing HP bloatware) and I'm trying to find the OEM-SLP key. I ...
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0answers
125 views

How to find Windows 8.1 Product Key After Upgrading to Windows 10

I had purchased originally installed windows 8.1 Laptop which got upgraded to windows 10. Can I retrieve my windows 8.1 product keys now after upgradation to windows 10.
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1answer
72 views

Check partially unreadable CoA Product Key

Two characters are missing on a torn Windows 7 Professional ACER sticker. While I can build a list of matching product keys with combination generator like this one, how could I check its validity? ...
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1answer
89 views

Skip upgrading W8 Pro to W10 and install W10 and use key from W8 Pro?

I am sorry to have to ask this question, but I do not have the points to just comment on some of the similar questions: Windows 10 Clean Install and Windows 8.1 Product Key [duplicate] Can I install ...
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3answers
107 views

New computer purchased without COA or Product Key

My brother recently purchased a new computer with Windows 7 Home Premium 64 bit installed on it. He got it from either an individual, or a company, I'm not sure which. The problem is, when he first ...
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1answer
918 views

Windows 7 Product Key for Download Windows 7 Disc Images (ISO Files)

I lost my Windows 7 Product Key , so I restored it by software as Belarc and NirSoft , both them gave my the same Product Key . Now I try to Download Windows 7 Disc Images (ISO Files) , and I asked ...
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0answers
64 views

How recover the Product Key of an installed activated Adobe Acrobat XI Standard

I have an activated Adobe Acrobat XI Standard (Version 11.0.13) on my old PC and want to get it to my new PC. As you can guess though the title, I unfortunately I lost the CD where the Product Key ...
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0answers
26 views

Is there a way to see when the product key of a windows os was last changed?

Is there some way I can see when the product key of Windows Server was changed last? I'm trying to find out if our old IT guy changed the product key on one of our MSDN licensed OSs before he left.
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0answers
15 views

Can I activate windows 10 with Windows 8.1 Product Key? [duplicate]

I have a windows 8.1 product key. I have plan to clean install windows 10. After I download the Windows 10 ISO and Can I install it using windows 8.1 product key?
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3answers
2k 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 ...
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1answer
275 views

Windows 7 Activation key stop working

I tried to upgrade to Windows 10 a few days ago. Something went wrong, and my computer began to operate extremely slow. After several unsuccessful attempts at troubleshooting, I decided to reinstall ...
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1answer
272 views

How to enter product key for trial version of Office 2013

My new laptop came with a trial version of Microsoft office Professional Plus, this trial lasts for 30 days. So I found a website that sells the key I need, here is the link to the website: ...
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3answers
14k 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 ...
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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 ...
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0answers
60 views

Is there any way to get Windows 8 (not 8.1) Installation Media if I only have access to Windows 8.1?

Long story short, I've got a device and an OEM Product Key for a licence for Windows 8 on it. After a complicated journey of many upgrades and downgrades now I find myself with Windows 8.1 installed ...
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1answer
58 views

Is there a way to reusing a product key for Windows? (with specific details, please read description) [duplicate]

Here's how the story goes Bob buys a laptop with the Windows 7 OS on it (on the bottom of the laptop is a windows 7 product key, but it's useless, because it's already used on that laptop) He then ...
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2answers
135 views

purchase a laptop to recycle windows product key

I need to activate Windows 7 ultimate x64 on my workingstation and I have to buy a product key. I'm considering opting for a solution with a greater value for money: purchasing a cheap used laptop ...
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1answer
256 views

Reinstall Window 8 single language on a Dell preinstalled laptop

My Dell laptop came with Windows 8 Single Language 64bit, the below sticker having product key got erased. Contacted dell and they told product will be embeded inside Motherboard, I just need to run ...
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0answers
42 views

Reinstall windows 10 with new build [duplicate]

I had Orginal Windows 8.1 and I just upgraded it to Windows 10 'build 10240'. Now, I doesn't get any updates like update to build 10586 (maybe you know why). I want to perform clean install of new ...
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1answer
386 views

How to upgrade from Windows 10 Home without product key to Pro

So, being the dummy I am, I installed Windows 10 Home over Windows 7 Pro. Right now, Windows 10 Home is unactivated because I can't use my 7 Pro key to activate 10's Home edition (I get error code: ...
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1answer
103 views

Clean install of Windows 10 OEM: license key issues?

I have been a Linux user after switching from Windows 98 and never looked back. However, a friend asked me to set up their brand-new Lenovo ThinkPad with Windows 10. I was totally startled at how ...
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0answers
162 views

Is it possible to use a Windows 10 product key to activate a Windows 7 installation?

This question is the opposite of the problem that most people have, and I haven't found a good answer for it yet. My company has custom hardware configurations on shipped systems, and we are ...
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2answers
7k 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 ...
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0answers
77 views

Product key invalid after going from windows 7 to 10 and back again

I upgraded my Window 7 Home Premium to Windows 10, then went back to Windows 7 and now it says my product key is invalid for activation and I have 7 days to enter new key. Any idea how to correct ...
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0answers
141 views

Find Windows 7 Product key after windows 10 upgrade

I know a form of this question has been asked before but... A client of mine upgraded her pc from windows 7 to windows 10 more than 30 days ago. She hates windows 10 and wants windows 7 back on ...
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1answer
228 views

Changing product key on Windows 7 MSDN

How do I change the product key for a MSDN based Windows 7 Ultimate 64-bit PC? I am aware that if I had a retail version, then the process would be simple, namely Control Panel | System | Windows ...
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1answer
3k views

Windows 10 “Device Limit Reached”

I have Windows 10 installed on 3 laptops and only 1 of them can be activated. I checked the product keys and they are the SAME. All 3 of those laptops had their own product keys prior to the upgrade. ...
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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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1answer
133 views

My Windows 7 Product Key does not match with my current windows version

let me explain Since I'd heard that Windows 10 was coming for free, I been crazy waiting for the notification to appear on my task bar, but nothing would happen. Two months ago I was surprised ...
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2answers
64k 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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1answer
142 views

Can I install Windows 7 from ISO then activate with key from DVD

If I download a legit windows 7 iso from here http://www.microsoft.com/en-us/software-recovery and I have a legit windows 7 installation DVD (retail, not OEM), can I activate using that product key?
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4answers
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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 ...
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1answer
2k views

How to find out which windows version my product key matches?

I retrieved my Windows 8 product key from the firmware but have no idea which version it's supposed to match. My Windows 8 cannot be booted into (hence the need to re-install in the first place) How ...
0
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1answer
258 views

Switch product key windows 10 home and pro

I've got today windows 8.1 pro on my workstation and windows 8.1 home on my laptop. I've upgraded each of them to windows 10 (pro on workstation and home on laptop) last month. However, I need now ...
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1answer
132 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 ...
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2answers
201 views

Use of same product key in Windows 7 different version

I'm using Windows 7 Home version. Recently I switched to Windows 7 Ultimate. Can I use the same product key that was given for Windows 7 Home version in newly installed Windows 7 Ultimate? If so, can ...
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1answer
170 views

Why won't windows 10 allow me to upgrade without first entering windows 7 product key?

Ok, so I am running windows 7. I previously upgraded to 10 smoothly, however I blue screened frequently due to my graphics cards being ancient and not supported. I rolled back to windows 7 for the ...
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1answer
191 views

Windows 10 Product Key Expiration [closed]

Here's what my Windows 10 32-bit Enterprise Edition is showing via slmgr/xps method of activation check : What should i do ? Thanks
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1answer
460 views

Cannot refresh windows 8.1 after downgrade from windows 10

The computer started off as running windows 8.1 out of the box. When windows 10 was officially released, the computer was upgraded using a usb drive with windows 10 installation media, rather than ...
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1answer
103 views

Windows Product Key in Boot Menu

My Windows is corrupt now. There's some issue with the BCD. What I wanted to know was is there anyway, I can get to know the Product Serial Key through the Boot Menu ? As I guess, I'll be ...
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1answer
129 views

If I delete pre-installed Windows 8.1, is it lost forever?

There's this Asus X200MA with fixed 2GB RAM and pre-installed Windows 8.1 . 2GB RAM + Windows combination makes a sad computer and a frustrated user. So I want to install Elementary OS Freya on it. I ...
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2answers
670 views

Windows 7 OEM product key isn't working

I have a problem with my Fujitsu Siemens Esprimo Mobile v6535 laptop. I got it from dump and the HDD was bad, so i replaced it. At the begining, i was using a non-genuine copy of windows (because the ...
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2answers
32k 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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4answers
6k views

What can cause Windows XP to reject a valid product key?

I bought a new motherboard last week. Windows 7 is running well, so now it's time to get my Windows XP running. I can't install direct from the original Windows XP Home CD (retail version) because it ...
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3answers
275 views

Windows 8.1 Reinstall?

I was helping a friend of mine who had a blank password on his Windows 8.1 computer. He recently got an update and since this update he is unable to login to his computer. His computer was not ...
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1answer
237 views

Windows 8 product key not working

was was running windows 8.1 for a long time on my laptop. Then a couple of weeks ago i installed windows 10 insider preview and used the product key that was provided by Microsoft to use with windows ...