Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Changing product/serial number on Windows 7 Ultimate 64 bit

05 Aug 2013   #1

Windows 7 Professional x64
Changing product/serial number on Windows 7 Ultimate 64 bit

Hi all,

New here, I hope that this is the right place for this.

I bought a machine a short while ago and it has come up with a popup saying that 'You may be a victim of software couterfeiting' and also on the bottom right corner I have the Windows 7 build 7601 'This copy of Windows is not genuine'.

I've gone back to the seller who is not interested (I'll deal with this separately!).

The purpose of my post is that I want to make my copy legit and have been looking on eBay and there are Windows 7 Ultimate 64 bit CD's with COA.

Will I have to reinstall the whole operating system or can I follow some of the guides on here and just change my product key from the one that I buy with the CD?

I really want to avoid formatting and reinstalling as I have just got the machine set up as I want it and it will take considerable time to get it back to how it is now.

Thanks in advance for any advice/tips!

My System SpecsSystem Spec
05 Aug 2013   #2

Microsoft Community Contributor Award Recipient

Win 7 Pro x64 / Win 10 Pro

Welcome to the Seven Forums

Do not buy a new DVD and license off of eBay you will end up back in the same situation where it will not be genuine.

You should contact Microsoft and turn in seller, sometimes in the past they have given a person that does that a free copy of Windows 7.

My System SpecsSystem Spec
05 Aug 2013   #3

Windows 7 Professional x64

Hi, thanks.

I guess that was my plan B! I was kind of hoping to avoid the full cost of Microsofts OS by getting what looked like an us-used copy on eBay. The seller does have good feedback, specifically for the same products...

Thanks for your feedback.
My System SpecsSystem Spec


 Changing product/serial number on Windows 7 Ultimate 64 bit

Thread Tools

Similar help and support threads
Thread Forum
Product Key Number for Windows 7 - Find and See
How to Find and See the Windows 7 Product Key Number The Windows 7 product key number is a sequence of 25 letters and numbers divided into 5 groups of 5 characters each (ex: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX) that is used to activate either the 32-bit or 64-bit Windows 7 edition that you...
Serial Number Wont Authorize - Windows 7
Rebuilt my computer and now Windows 7 wont recognize my SN as legit Diagnostic Report (1.9.0027.0): ----------------------------------------- Windows Validation Data--> Validation Code: 50 Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Updates & Activation
Windows 7 home prem serial number issue
Hi I hope you can help with a recent issue thats shown itself. I bought a used Acer Aspire 5542 laptop months ago running Win 7 home prem with all the latest updates and everything running fine. A few days ago a message popped up telling me the serial number was invalid although there is the...
Windows Updates & Activation
Max. number of serial ports in Windows 7
We are trying to use a computer with windows 7 to control some devices with serial ports. However, we are wondering how many serial ports can Windows 7 support? What is the restriction for using the maximum number of serial ports? Is there any other restricction regarding hardware? Thanks
Hardware & Devices
Release Windows 7 Serial Number?
I have a custom built pc (Intel Atom) and my hard drive on it recently died and I did not have a back up. Is it possible to contact Microsoft and have them manually free my serial number? Do I need to phone them? If it is possible for them to release it, what should I give them, proof of sale? ...
Installation & Setup

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:22.
Twitter Facebook Google+