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How to: Fix Windows 10 uprade error code 80240020

Having been running the technical previews of Windows 10 for quite a while I wanted to get it on our home laptop as soon as possible, well I finally managed to find some time last week to try the in place upgrade, and it didn’t quite to plan!

I completely patched our Windows 8.1 laptop so that it was up to date, all important and optional updates installed. I’d signed up to reserve my copy of…