Thanks once again!

Windows 10 Is Now Running!!

Summary:
When I originally clicked on the upgrade link from MS, it started the process but asked for the Win 7 product key. (But rejected it)
I then tried ISO files....

I have run out of time today! Will resume tomorrow. Thanks to all who have helped so far. Much appreciated.

77727

The PC was built in 2009. The builder installed a new HDD in 2011 and installed a New / Sealed copy of Win 7 - which I have. It has not been used for any other PC's.

Roy
Sorry, but not really sure of the implications of your comment.

7772477723

Problem in 2011 (seven forum) was subsequently resolved by BIOS update. The C drive installed in 2011 and still in use was a new clean HDD & installed with the current Windows 7 Home Premium 64bit. ...

Sorry, I don't understand! The PC was built for me and windows 7 was installed with OEM software. The software has been verified by MS.

Showkey quotes the correct ket I have been using.

I'm sure I downloaded the correct version. The 2nd time I downloaded the ISO file it was on a friends PC because my broadband is so slow. Does the ISO have to be downloaded by the PC to be upgraded?

There is no option to skip the product key - either try again or quit.
Windows 7 was not a beta copy. It has not been installed on any other computers. I did not install Win 8, but my version of 7...

I started the upgrade from Win 7 Home Premium to 10. I entered the product key, but get the message "Product Key didn't work". I have repeated this several times - I have the original disk & label,...