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Windows PRO Upgrade product keys and automated installation

Hi Guys,
I have 28 Microsoft product keys.
The product keys are good to upgrade from Windows 8.1 Home to Windows 8.1 Professional.

For each of the 28 computers I need to:
1. Upgrade it from Windows 8.1 Home to Windows 8.1 Professional using one of the product keys.
2. Upgrade to Windows 10 Professional for free using the software provided by Microsoft.
3. Do a system restore so that all the trash accumulated by the user is removed and we end up with a "brand new"  Windows 10 Pro installation.

I have done this manually and it is Ok, I mean it works.

Is there a way to automate this process, like creating an image of a PC?

I have been thinking about this but the fact that each PC needs a different Product Key to upgrade from Windows 8.1 Home to Windows 8.1 Professional keeps getting in the way of any automation options I have come up with.

Thanks in advance.
Any idea you have will be appreciated.
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Cliff Galiher
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There is no good way to automate this. Only 8.1 VL will install without a key and you can't effectively automate handing out a unique key to each machine with tools like MDT.

This is where volume licensing really pays off. One key (mak, KMS, etc), customizable media, and automation options. Microsoft just didn't design retail keys for large deployments.
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☠ MASQ ☠

No imaging isn't an option for you because these are individually licensed machines you need to upgrade them individually, you might be able to skip the Windows Updates stage though.  Try running the Windows 10 setup immediately after restarting from the 8.1 key change.
Not certain, but I'm pretty sure Masq is correct that you can skip all the upgrades after you've done the 8.1 upgrade.

You can also, when you're doing the upgrade to 10, select the "keep nothing" option and it will do a clean install of '10.     Of course if you're going to do this, be sure you've backed up all of the user's data and that you have the appropriate installation media for any added programs they use.
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It's a Windows 8.1 Pro pack
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Mr. McKnife,
I think I could make the following work given the information you have provided.

1. Upgrade the computers using the product keys. (The upgrade process doesn't really take too long and there are only 28 computers).

2. Add the upgraded computers to the domain and put them in a different OU

3. Use GPO to execute the Windows 10 Pro Upgrade using the command you are providing
\\server\share10\setup.exe /auto clean

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Thank you Guys.
You comments have been really helpful as usual.
Have a nice weekend.