Hello, I would like to do a clean install of Win 10 on an older Toshiba laptop currently running Vista. The specs are fine. I believe Win 10 won't be a free upgrade for Vista so I'd like to know my best (and cheapest) option. Is it to buy a Win 7 upgrade (which seems to be ~£70) and then get Win 10 for free or buy Win 10 outright? Or something else. Thanks!