I updated from Win 8.1 to Win 10 today using the update ap.
Everything went well except that Windows 10 will not authenticate.
I'm running a Dell XPS8700 that came with windows 8.1. Windows 8.1 was fully updated when I began the update to Windows 10 and I haven't made any hardware changes since I purchased the computer from Dell almost a year ago.
On the activation screen I get error 0x004c003: product key blocked
Any suggestions or solutions to this? I inferred from another site that it might just be a matter of time until the Microsoft servers catch up with the authentication workload - but it's been 5 hours since I completed the updated.
:emotion-40: Well, I've been away on business for a week and still the same activation error.... I don't have any time until the end of the month to try any unique fixes - perhaps I'll contact Dell service support and see if that brings any joy.... Not optimistic though.
All good to go. Used the Microsoft support chat and a tech was able to fix the problem. He confirmed that my serial # was good then manually activated my Windows 10. Was a 20min process but it worked in the end.
Philip_Yip
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Posted August 2nd, 2015 04:00
If that fails you can download the Windows 10 Insider Preview Build 10130 and then upgrade to Windows 10240 from that:
http://dellwindowsreinstallationguide.com/a-clean-install-of-windows/a-clean-install-of-windows-10/windows-xpvista-%e2%86%92-windows-10-free-upgrade/
Windows 11 Installation Guide
Windows 7 Installation Guide