FWIW:
I now set up my well heeled clients on a Mac and install Parallels (12 is the latest version) and either Windows 7 or 8.1.
I, of course, turn off updates after I bring IE up to version 11.
Windows is only open when you want it open and I/We never have had any issues with MS screwing up the Windows partition.
If you are interested you need at least 8GB RAM.
PS - look at the Mac Mini - it’s a powerhouse and very reasonably priced for a Mac.
Thx ...