Answer by Thomas for Windows 10 Setup has failed to validate the product key
None of the other answers worked for me, though Moshe Katz's answer did point me to the log files. Under C:\$Windows.~BT\Sources\Panther there are two log files, including an setuperr.log which...
View ArticleAnswer by pbaranski for Windows 10 Setup has failed to validate the product key
Had same issue - below steps helped me to finish successful upgrade from Windows 8.1 to 10 worked1. Run disk cleanup utility https://support.microsoft.com/en-us/help/17421/windows-free-up-drive-space2....
View ArticleAnswer by ender for Windows 10 Setup has failed to validate the product key
Had the same problem when upgrading from Windows 7. The solution was to temporarily remove the machine from domain.
View ArticleAnswer by Moshe Katz for Windows 10 Setup has failed to validate the product key
I read through the log files in C:\$Windows.~BT and discovered an error message that said:Unable to create temp file in C:\Users\me\AppData\Local\Temp. The file already exists.(That's not the exact...
View ArticleWindows 10 Setup has failed to validate the product key
I am trying to run the upgrade from my Windows 8.1 Pro computer to Windows 10. It keeps telling me:Setup has failed to validate the product keyThis has happened when clicking "Upgrade" inside the...
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