We have a number of similar PC's in our organisation. We can download and read .pdf files on all these PC's. On most of our PC's we can also enter data into these downloaded forms and then print out the forms and/or send them back duly completed (we are dealing with a government website). However, on one almost new Windows 7 PC, once we have accessed a document, we find that we cannot select a field and enter data. Any ideas?