Posted by Bill Davies 2 on 28/01/2020 13:51:02:
… I was not able to perform an install or download an ISO image, both failed on the license key. The laptop came with Windows pre-installed, so it has an OEM key. MS has previously indicated it was a 'legal' version.
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Bill
Perhaps Microsoft have pulled the plug on free upgrades? Certainly, Windows 7 is out of support, and I don't think MS promised to keep the free upgrade offer open indefinitely.
More hopefully, it might be that the OEM key stored inside the machine is invalid for this upgrade. The OEM key is a general purpose convenience in the factory, not quite as straightforwardly simple as an ordinary key. Instead of the built in OEM key, you may have to use the key printed on the Certificate Label stuck under the machine – it's different! Printed labels have since been phased out: new computers store the licence key in the BIOS, where it can't get lost, and should always just work. In future OEM key problems should vanish.
Although unlikely if it's already running W7 an older laptop might not be man enough to run Windows 10 – insufficient memory, unsupported devices etc. W10 won't install on a machine that can't run it.
Second question, installing W10 from scratch. A new W10 is rather more complicated than uplifting from W7 or 8 to W10 using Microsoft's automated process. Uplifting leaves the old programs in place with a reasonable chance they'll still work, whereas overwriting W7 with W10 wipes the slate clean. Data can simply be saved and copied back, but applications are often irksome. Installers depend on an analysis of the configuration (operating system, DLLs and hardware), plus licence validation, rather than just doing a straight copy.
May be more trouble than it's worth? Could just stay on W7 until a new computer is bought, and then tackle the migration problem.
Dave