and for win 7 also
rumor is you can still do it
but the upgrade is known for many issues, and most people recomend a fresh install
just use the win7/win8 key
i got my key from scdkey, no issues with it
you can download the media from microsoft, even install it without activation, you just can do a few things
i recommend a fresh install, not an upgrade
your better off, norton av is a virus itself, use ms security essentials and either firefox or chrome and your pretty good to go
havent had an issue in over 10 years doing this