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Windows 7: How do I determine which Windows 7 installation disk I used to update

12 Jun 2016   #1
Joeacusa

Windows 7 Home Premium 64 bit
 
 
How do I determine which Windows 7 installation disk I used to update

I have 3 computers, each with Windows 7 installed, using legally purchased disks. I wish to remove Windows 10 from a Dell Inspiron 15 laptop and re-install the Windows 7, but I don't know which disk to use. How do I determine which disk, and it required ID number, to use? Or does it make a difference?

Joeacusa


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12 Jun 2016   #2
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

Have you got the license key for the original win 7 installation on the Dell inspiron? It is probably on sticker somewhere on the machine.
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12 Jun 2016   #3
Joeacusa

Windows 7 Home Premium 64 bit
 
 

The Dell originally had Windows 8 on it and I installed Windows 7 from a disk that I have, but I don't know WHICH disk, or, therefore, which of the 3 activation codes on the 3 disks.
My System SpecsSystem Spec
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12 Jun 2016   #4
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

The installation disc (DVD) does not have a key built into it.
The key should be on a COA sticker that was supplied with the purchased disc.

If you still have 2 running PC's with Win 7 that you purchased and installed, you can use a tool such as Belarc Advisor to see key on that PC.
That should leave you with only one "unknown" key that was used on the Dell laptop, now running Win 10.

Belarc Advisor - Free Personal PC Audit, for software, hardware and security configuration information on your computer. Software license management, IT asset management, cyber security audits, and more.
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12 Jun 2016   #5
Joeacusa

Windows 7 Home Premium 64 bit
 
 

Thanks. I'll try that.
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 How do I determine which Windows 7 installation disk I used to update




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