>While what you say is undoubtedly veridical, it marks you out as a bit of an amateur.
Probably and that's the main reason I got out of that area of IT. Kept getting told how to do a better job by experts..
>Upgrading Windows is vastly inferior to a clean install.
I'd agree, upgrading Windows IS vastly inferior. But I never said it was my first choice and I never said I never do clean installs. But did customers always pay me to do backup their data (I did anyway), perform a clean install, migrate their user data and reinstall their applications? Beside, they've often lost the install media and didn't have the savvy to photograph the product key that was fading away on the bottom of their notebook or power supply. So economic reality won. I'd also like to point out that most of the time I'd receive the laptop/workstation AFTER windows 10 (or previous versions) had updated and borked.
>You can't reinstall the previous Windows version if you lack install media and the Product Key.
That's for that Captain Obvious, but exactly what has that got to do with my original post?
Yes, sometimes I had to use install/recovery media, bootable linux, mount a hard drive on another PC or whatever it took. Points I was trying to make was
a) Doing an upgrade, Windows stores data in windows.old
b) That anybody CHARGING folks to fix borked Windows 10 updates should be competent enough to have the means of accessing that data.
c) I never lost anybody's data from a Windows update..
I probably should have stated that yes, the windows update rollback is often a dog and I probably just got lucky with point c. However its amazing how many laptops are out there with perfectly good customer data in a windows.old folder that end users have no idea exists because some muppet has charged them an arm and a leg to fix their failed windows upgrade, not bothered (or known) how to transfer their data and just told them that it's gone and it's all Microsoft's fault.