Problems in Word and Outlook 2003 selecting and editing Text?

I have a user that I support that has come to me with this error. Ever since they have installed Adobe Creative suite CS4, they have had trouble using word and outlook.
There are problems selecting / editing text with the cursor and the only way to resolve is to go out of word/outlook.
Once they are out of word / outlook a box comes up saying save changes to PDF custom…. They have been selecting no and can go back into work/outlook and start editing text again… but usually an hour or two later the problem returns.

Have Tried Un-installing and re-installing. Checked so many diffent options in Word. I think it could be related to the Adobe PDF maker addin.

Please Help!