Windows 10 Stuck on "Preparing For The Upgrade"

[oisinf123]

Hi

Started over an hour ago, stuck on screen shown. any help?
Thanks in advance 

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[Geek-9pm]

So you have Windows 7 and you choose t to upgrade to Windows 10.
And you have another device to post here. How? That is a screen shot.
You do have a backup of your Windows 7 system? Or maybe you reverted back to Windows 7.

You may want to get a fresh download of Windows 10.

This might be relevant:
Installing Windows 10 using the media creation tool

The media creation tool can be used to upgrade your current PC to Windows 10 or to create a USB or DVD and install Windows 10 on a different PC.

My install of Windows 10 was a 'Clean install' from media, not the upgrade option. However, it was not necessary for me to buy a license key for Windows 10.

If you can revert back to the original Windows 7, I suggest you do that. Next resize the hard disk partition so that Windows 10 will have enough free space for a clean install rather that trying to update your windows 7 system.

Windows 10 installer creates a dual boot system if you do not upgrade the  Windows 7 system. It is not clear to me if Microsoft did a recent change  to its license policy for Windows 10.
EDIT:
The link below may have new information:
http://www.howtogeek.com/226510/how-to-use-your-free-windows-10-license-after-changing-your-pc%E2%80%99s-hardware/