Migrating to Windows 10
When I migrated my PC and small laptop to Windows 10, I left my Dell Mobile Workstation running Windows 10, as an insurance policy. With the withdrawal of suport for Windows 7 in January and my eldest wanting to borrow the big laptop to work from home, I bit the bullet and went for it today.
Not only was I able to do this for free, but it could not have of gone smoother. I can't believe I actually said that! It just installed and worked no need for the COA serial or anything.
Interestingly, it installed the latest build 1909. My PC is on 1809, the update I had all the problems with and the small laptop is on 1903.