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My licence key is "invalid" after installing new SSD drive

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  • Windows 7
  • Hard Drives
  • SSD
Last response: in Windows 7
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August 15, 2014 7:58:25 AM

Hello,

The HDD of my Acer Aspire 5742G with "Windows 7 Home Premium OA" (I don't know whatthe OA stands for but it says so on a sticker on the back of the laptop) failed a while ago. I used the necessity to buy a new disk drive to upgrade to SSD, but since my old hard drive is completely broken and files from it are unreadable, I have to install Windows 7 from scratch.

I have managed to find a windows 7 ISO on the windows help forums: (https://answers.microsoft.com/en-us/windows/forum/windo...)

However when I try to use the licence key on the back of my laptop, it says something along the lines of "licence key invalid". I read on the internet that this may be because the windows version that I downloaded on ISO is different from the one installed, but they are both windows 7 home premium (without service pack as far as I can tell).

before making this post I've tried to find out myself how to solve this, but haven't been able to find a solution, maybe because I don't know where to look.

So my question is: how do I use my existing licence key to activate a new windows 7 home premium on my laptop?

ps. I don't really need the Acer-specific software, so if possible, I'd just like a windows-only install.

More about : licence key invalid installing ssd drive

a b $ Windows 7
August 15, 2014 8:02:35 AM

What was installed previously was OEM, what you downloaded is retail. The keys are different. You cannot activate a retail copy with an OEM key (and vice versa). Contact Acer for a set of recovery discs.
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a b $ Windows 7
August 15, 2014 8:05:56 AM

ex_bubblehead said:
What was installed previously was OEM, what you downloaded is retail. The keys are different. You cannot activate a retail copy with an OEM key (and vice versa). Contact Acer for a set of recovery discs.


This is typically correct but not always. In this case I would suspect this to be your problem.
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a b $ Windows 7
August 15, 2014 8:15:32 AM

Hello... You will have to give Microsoft a call to get a un-lock code from them... tell them your Hardrive ( or MB failed )... It is a pretty painless procedure. You are a legal owner of the Windows version described on your COA Sticker... Also you can save some time by installing a SP1 version.
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August 15, 2014 11:52:44 PM

Edit:
Ok I tried it again after having contacted Microsoft, and now it works! I have absolutely no idea why. maybe by filling in the large activation number during the call it somehow changed something. This is really weird, because during the call with microsoft, the guy on the phone said that it was an invalid licence key.
But oh well, it somehow worked :) .

I am now trying both your advices

ex_bubblehead said:
What was installed previously was OEM, what you downloaded is retail. The keys are different. You cannot activate a retail copy with an OEM key (and vice versa). Contact Acer for a set of recovery discs.


I've sent Acer an email-request for recovery disks. However this will likely take a long time. Does anyone know where I can maybe download a (legitimate) ISO file of an OEM windows 7 Home premium that will work on my acer aspire?

Ironsounds said:
Hello... You will have to give Microsoft a call to get a un-lock code from them... tell them your Hardrive ( or MB failed )... It is a pretty painless procedure. You are a legal owner of the Windows version described on your COA Sticker... Also you can save some time by installing a SP1 version.


How should I call them? After reading your suggestion, I went to Microsoft.com to the support page, and tried to go to phone support, but for some bizarre reason, it said it costs me 72 Euro's to get support, which is of course a bizarre amount of money. I then went to the activation center, but the guy on the phone said he can't help me because my licence key is "invalid". Is it possible that my licence key is invalid according to him because it is an OEM licence key? Is it normal that an OEM licence key is considered invalid by the windows activation centre?

EDIT:
I just went to Acer's website to get eRecovery disks, but the website says that Acer does not recognize my SNID number or serial number. I have brought my laptop back to the store in which I bought it for repair a couple of years ago. Is it possible that they installed an illegal copy of windows and that that is the reason why my serial number is not working?
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