the best way to fix the pin issue is to roll back to a build of Windows 10 that allows netplwiz... this is why my work laptop disabled updates
as for the office, its because your account still has the old computer listed and your options are;
buy another copy, remove the old computer from your office account, find the old email with the license, use some other software instead [this is what i do now] or some how use the old computer to run office i.e, make it a V-system inside the current one