ShowKeyPlus is product key finder designed to display not only your Windows 10 key but also the Windows 7, 8 / 8.1 key that was used to upgrade to Windows 10.
Problem is that ShowKeyPlus (downloaded in .zip format) once extracted is detected as a virus and deleted.
Anyone know why it detected as a virus as other product key finders are not detected as a virus (but they don't have the ability to retrieve the previous version of Windows product key after you have upgraded to Windows 10, which ShowKeyPlus can)