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A pal of decades and a computer savvy chap, fellow pro photog, got himself a laptop with a 500G 7200RPM scratch drive and an SSD 350G secondary. He decided to get a 500G SSD and switch the C: and D: drive "jobs" to use the spinny one as file storage and the SSD for the O/S and app proggies. Seemed like a good idea. He "ghosted" the O/S from the disc drive to the larger SSD, but Winblows 10 REFUSED to disappear from the SATA 7200 RPM one. He gave up and brought it to me. I spent hours with all sorts of MILSPEC utilities trying to wipe that thing to the state of stupid, finally learned you must use partitioning warez on it first, eliminate the various MS-schemed partitions before it will allow you to "erase" the O/S.
MS Windows: More insidious with every incarnation.
MS Windows: More insidious with every incarnation.