Strange! I am also using thunderbird since 4 years but not get any spam emails due to thunderbird. Is their spam folder created on thunderbird? Are these emails going to spam folder or Inbox?
Yes, you can use window 7 or 8 key in window 10 but you can't use that key on more then one system unless you have key for multiple machine. According to Microsoft, You can also use a using a Windows 7, Windows 8, or Windows 8.1 product key to activate Windows 10 Version 1511 or higher.
Yeah, i heard that. It will expand the market potential by several factors like driving the growth of VR on PC and matching the value proposition of products like the PSVR.