I've tried everything mentioned here but actually talking to a person which I guess is the next thing. Sadly I suspect some how my key has been cloned as it has worked OK for the past couple of years. As for not updating it has never been an issue as it is never used for accessing the net or web browsing, it runs 3 applications one of which ftp's to my web site and one which downloads data from specific sites for weather data, but it's pure data.
I did look to see if I could purchase a new key for W7 from Microsoft but they only want to sell a W 10 key which I will never use as W7 is perfect for my needs.
Stuart