Key Activation Error 0xC004C003
Jul 29, 2015
Today I upraded from Win7 to Win10 via the Windows update thing in Win7. I wanted to check if everything ran fine, but i wanted to get a clean isntall. When i was done upgrading i checked my Key via Magic Jelly Bean Keyfinder. I then formatted my C: drive and did a clean isntall via a USB stick. When I was done installing I tried to activate windows with the key i extracted and got the Error 0xC004C003. Is there any solution to this? Alternatively would my Windows 7 key still work?
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Aug 7, 2015
I'm having this issue on a Store purchased Toshiba Satellite Pro which had Windows 7 Home Prem. I followed all the upgrade instructions and it all looks good except it's not activated. Product key blocked. Error code: 0xC004C003
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Aug 15, 2015
I had upgraded from W8.1 and Windows 10 was activated. I was under the impression that I didn't need a product key and that my PC would be recognized after doing a clean install. Now I have W10 installed fresh, but get the error code: Error code: 0xC004C003
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Oct 25, 2015
Just upgraded to an MSI 970 motherboard and now windows 10 pro is giving me an activation error code along with a water mark in the right corner. I did the free upgrade from windows 8.1 pro to windows 10 pro back in late August.
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Jul 29, 2015
I did a clean install of Windows 10 Pro x64 using the method that everyone knows about by now that was written up on various sites today i.e.:
Ran the Media Creation Tool and upgraded my copy of Window 8.1 Professional with Windows 10 Professional. Looked in Control Panel --> System and it said my copy of Windows was activated. Then I ran the Media Creation Tool again and downloaded the ISO. Burned ISO to DVD. Restarted computer, booted into Windows installer on DVD, customized the install by formatting drive, did a fresh install of Windows 10.
Now when I go into Control Panel --> System it says "Windows not activated". When I click on the Activate Windows icon and click the error details link I get the error code: 0xC004C003.
I should note that the Windows 8 OS came pre-installed on my laptop which I bought brand new. I don't think that matters?
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Jul 31, 2015
I upgraded from 8.1 on Dell XPS 8700 and the download and installation completed flawlessly. I did a winver and it shows Windows 10 Build 10240.
However, it will not validate, showing the error : "The filename, directory name, or volume label syntax is incorrect. (Error code: 0x8007007B)"
I also ran software that returned the following information.
"Windows Product Key Information
Product Name: Windows 10 Home
Product ID: 00326-30000-00001-AA668
Installed Key: TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
OEM Key: *****-*****-*****-*****-HFQ2D
OEM Edition: Win 8.1 RTM Core OEM:DM
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Sep 29, 2015
After upgrading to 10547, getting EC: 0xC004C003
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Aug 27, 2015
Background: We have purchased 14 HP EliteBook 820 laptops (which come with Windows 8.1 downgraded to Win 7 preinstalled) to rollout within our company and my usual method for laptop rollouts is to setup one with our corporate apps etc, run SysPrep and then clone the hard drive to the rest of the laptops.
This has worked fine in the past with Windows XP and 7 but with the introduction of the free upgrade to Windows 10 which we want to take advantage of it has produced a problem.
Problem: I have setup one laptop and gone through the free upgrade to Windows 10 then installed our required apps etc, run SysPrep, shutdown and cloned the hard drive to another hard drive to go into the next laptop (same model) to rollout.
Windows is then unable to activate giving error code 0xC004C003 meaning the key is blocked.
Because the laptops have OEM Windows licences pre-installed this means that I don't have a product key sticker; it is embedded in the BIOS.
I am assuming that at the point of upgrade the Microsoft servers check the key and add it to their list of 'OK' keys to allow the upgrade.
When the cloned hard drive is placed into another laptop the key embedded into the BIOS is not OK and Windows does not activate? I've tried the slui program to remove the licence but that just removes the key and asks for a new one. I have also tried doing the clone of a clean install after upgrading. I have tried speaking to HP and Microsoft but each one said speak to the other.
Currently my only option is to setup one laptop with the OEM Win 7 or 8.1, install our Apps, do the SysPrep and cloning and then upgrade each one individually at the end of the OOBE experience. This will be more time consuming when rolling out and rebuilding.
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Nov 12, 2015
Is there a way to find out which key was used for activation?
I have done testing with insider programs. I also tested this with my windows 7 oem install, I rolled the oem back to windows 7. I also used a windows 7 retail version to also upgrade to windows 10. This way I can keep my multiple boot setup. I just want to be legit that is all.
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Sep 2, 2015
I have never had problems activating genuine copies of Windows. Changing cpu's, hdd's ram and graphics cards have never bothered Microsoft. Back in the XP days, I also changed motherboards with OEM software successfully. As far as I can tell, only changing the motherboard would cause problems with modern operating systems. I have changed hdd's for ssd's and vice versa and graphics cards with no problems on W10 upgrades. Today, I received a cpu from Ebay and fitted it into the pc which runs 8.1 and W10 upgrade from W7hp. BIOS recognised it at once, but both copies of Windows required a restart, system and device manager failed to recognise the cpu first time. Activation was not affected in either copy of Windows.
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Oct 30, 2015
laptop has Win 10 that was an free upgrade from Windows 7. If I clone to SSD will activation remain? I know if hardware changes will be an issue. I will backup key just in case, not sure it is needed. later hopefully a fresh install.
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Aug 1, 2015
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Sep 15, 2015
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Aug 1, 2015
This method will give IMO the best way of updating your system to W10 via an "Almost" clean install.
1) Re-install CLEAN your old legacy OS -- at boot delete all the Windows partitions so there's NOTHING on the HDD (or Windows "C" partition.
2) Ignore / skip the prompt for Windows 10 is available.
3) let the install finish together with any updates the system finds during the install. DO NOT INSTALL ANYTHING ELSE at this stage.
4) VERY IMPORTANT -- ACTIVATE WINDOWS via entering your product key (of the OLD OS). You might need to use control panel and enter Change product key if you are using say your old MSDN / TechNet keys.
5) now go into Windows update via control panel and you'll be offered the Windows 10 upgrade
you are now done and activated -- it's as good as a CLEAN install -- plus you'll have the odd driver working that W10 might not find.
If you want REALLY to do a clean install later then there are many ways via ISO etc to do it -- but your OLD OS must be activated first before any W10 upgrade if you want to have an activated product.
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Aug 20, 2015
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Sep 30, 2015
I upgraded to Windows 10 from Windows 7 on Dell XPS 15 L502x(Sandy Bridge). Later i did a fresh install and Windows 10 activated automatically as it should.
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