Many thanks for suggestion 124. I did try this and did manage to download and update to SP2. However, on starting up again several things happened. Within a minute or so of start up my remote mouse stopped functioning, but the laptop touchpad continued to work. then the Internet failed and the whole system seemed to lock down such that I had to force a shutdown. I did several Restarts but produced the same effect. I did a safe start and restored back to SP1 where all is working. If no other solution comes along then I can live without future updates. Maybe this is another reason for moving away from Vista. Thank you anyway, it was worth a try. Regards, valbv.
OnePlus 5T review