Quick search of model showed it usually came win Win 10 home, Just download win 10 install media from Microsoft and do a clean install. It won't have all the extras and bloatware that come with the Toshiba image and you'll need driver(available on toshiba's support)but imho that's a good thing.
http

/www.tomshardware.com/faq/id-3567655/clean-installation-windows.html