OK sorry Felix, I've now found out what I did
On this site (www.sony.co.uk) click on the Support tab, then on Register Your Product. Follow the process for this & I think, like me, you will find it works. (I had to locate my product number by looking through the various Vaio Series letters - didn't know I had an S Series, but that was where I found my model)
Previously I was following the shortcut from my programme menu & it's that which takes you through to the "broken" site.
Hope this works for you