Windows 7 has worked very well for me in sprut 8 and I hope in 9 as I have it on disk and a key ready to install.
Poking around and backing up files on my w.s. and setting up a directories for sprut 9 projects.
I hope I can step thru an upgrade and convert projects files, tools files, templates and operation setups I have done already
This could be serious work because I have so many files I see the need to organize this upgrade carefully.
md