My upgrade from Win 7 Pro to Win 10 Pro download was available immediately I paid. Following the clear instructions, it took 3-4 hours to load including updates and restarts. All finished and my troubles started : where are my documents, photos, emails etc. With help from Google I found I was far from alone with these problems but eventually managed to get my PC back in some kind of order. According to reports update KB4549951 is causing these frightening issues. No fault of Software Geeks but Microsoft should be punished for releasing this stuff before they have ironed out the faults. Even worse they had previously been bombarding me with messages saying they had withdrawn support for Windows 7 and recommended I should buy a new PC from their list of suppliers where I imagine some kind of kick back was involved. In other words go out and spend £1000 on a new PC because your life may well be a misery with an MS upgrade. Thanks a lot Microsoft!