Hi Trouble,
Thanks, finally got it up and going. For some reason I couldn't install windows 7 from the Vaio discs so installed the windows 8 64bit upgrade but couldn't activate it as it is only an upgrade. I turned off messages re: activation, so fingers crossed that all is OK.
(although they wouldn't let me get the media center as my disc wasn't activated.)
Anyway I installed the driver for the touchscreen from the link you gave me and voila, it worked. I also installed the Avermedia and NVIDIA drivers.
Thanks again,
Mavis Clark