Thank you so much Jan!
Initially by phone your explanations on the problem were so easy to understand, and then when you had completed works (1) converting a Netbook from Windows XP to Ubuntu, and then (2) by locked out of Windows 10 Lappy that I can now get into again – AND sooner than even you thought you could manage AND at such a reasonable price – what can I say but brilliant!
Your number is now in my diary for any of my clients with problems- first number to think of for future needs !