I might know the scenario you're thinking of, as of course there's more than one scenario for almost everything. Can I take a Win10 boot drive from a PC and stick it in another?  You bet.  It will then request to be reactivated online.  It may go thru some restarts due to "new hardware detected."  Drivers should update if needed.  If you have a Microsoft account, I'm sure it'll ask you to re-sign in. I did that with a Win7 HDD - from a 755 to a 790.  As we know, Win7 has less native drivers.  Simply had to update chipset and graphics drivers via Dell Support Assist. Anything important should always be backed up outside of PC whether it be cloud storage, flash drive, external HDD/SSD, etc.  Makes for easy transfers to a new PC or if you have to reload OS. The only catch is I don't recommend a flash drive for music.  When I've reloaded from a flash drive, some songs would have skips.  So now I only use spinning HDD for that.  They retain data longer. Also, now days, isn't it possible to backup an entire image of a PC?  That would also be cloning OS, so may not be supported by Dell or MS.
Can I use a backup from my previous computer to restore documents, emails, etc, to my new Dell? If so, how? For more questions regarding this contests, please visit the Contest Information Page here.
DS 07/19: Can I use a backup from previous computer to restore?