This is not necessarily a bug with Speccy, and I realise it could well be that 'problem lies with other product', but I would be grateful to run it past folks!
I read a magazine item about a product to check and display Windows licence key details - especially useful for Windows 8 machines which no longer include a sticker for the details but also helpful for older machines where the sticker has become unreadable. I downloaded and tested on an old HP PC running Vista - produced a perfect match for the key shown on the sticker on the side of the machine.
Next I tried on a Toshiba laptop