Would be to clone the HDD, boot on the new copy then uninstall the ATI driver and then try the W10 upgrade. See where it all falls out.
Remember I did not try what others have written up as I tend to try it my way.
https://www.google.com/search?q=ati+mobility+radeon+x1600&ie=utf-8&oe=utf-8#q=ati+mobility+radeon+x1600+windows+10 finds folk solving this.
would like to upgrade HP 8430 from w7 to w10. stopper is the ati mobility radeon x1600 driver. Is there an upgrade to that driver hat wirks? hesitant to attempt any rebuild.

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