You really need to provide some information; nobody knows what you are doing.
sorry new to this, I normally create documents in word and save to .pdf to send to clients, but i now have a new laptop and when i go to save in pdf, it previews it with the a large box in the centre of the document missing and i cant seem to see why it is doing it
Any help would be much appricated !
This is not Adobe Reader doing this, but Word. You should ask in a Microsoft Office forum.