i contacted customer support to help with my activation and after waiting 2 hours to speak to someone they said to reinstall 8 and upgrade again. that is unacceptable imo. the only thing i did to trigger this was flip my bios switch to the 2nd bios as my first got corrupt. no hardware change other than running my 2nd bios. this is what is bullshit. prior to win10 i could call the 800 number and enter the challenge code and get a new activation id or just speak to someone and explain that i have upgraded hardware and this install is only running on one computer. this does not work anymore with win10.