I have an OG release of Win 10 Pro on USB - and when I install it, I keep my computer offline and run it for a while on that first build. (Usually I faff around with the desktop and play with the UI for a bit) With that early Win 10 version, it can be installed with no internet and you don’t need to set up an online account. Then you go online and update it but by that point, your account is set locally to your machine, not online. Now, it crabs all the time at me to get a cloud account for backups and an Outlook for email (I use hotmail, actually) but I just ignore that.
If your are forced to install Windows at gunpoint use either Rufus or an Enterprise license. All other windows licenses are bluntly Adware/Spyware.
I have an OG release of Win 10 Pro on USB - and when I install it, I keep my computer offline and run it for a while on that first build. (Usually I faff around with the desktop and play with the UI for a bit) With that early Win 10 version, it can be installed with no internet and you don’t need to set up an online account. Then you go online and update it but by that point, your account is set locally to your machine, not online. Now, it crabs all the time at me to get a cloud account for backups and an Outlook for email (I use hotmail, actually) but I just ignore that.