1.    18 Jul 2016 #1
    Join Date : Jul 2015
    Posts : 96
    win 7/10

    win7 install

    Tried to install win7 on a new hdd but MS claims product code invalid, still have the original box that win7 came in. Have been using win10 for the biggest part of the year---what gives,. Is it after using win10 for a while MS no longer recognizes win 7?
      My ComputerSystem Spec
  2.    18 Jul 2016 #2
    Join Date : Jun 2016
    Los Angeles
    Posts : 1,198
    Windows 10 Pro

    If you activated this Windows 7 previously with this disc, you cannot activate it again.
    You can skip the product key in the install and Windows will install, then try putting the key in again. If that fails, then call Microsoft to activate your Windows again.
      My ComputerSystem Spec
  3.    18 Jul 2016 #3
    Join Date : Jul 2015
    Posts : 9,623
    Windows 10 Pro

    Run showkey plus from here:
    Showkey - Windows 10 Forums

    Click the option on the upper right to check product key and enter your product key. Post the result here and we can help you,

    Click image for larger version. 

Name:	Capture.JPG 
Views:	8 
Size:	36.1 KB 
ID:	90748

    Be sure to blank out part of the product key, or just post what the result is:
    Windows 7 Professional OEM:COA
      My ComputerSystem Spec


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