I am using MS office 2003. only yesterday everything was ok. BUt today whenever i try to open 1 .PDF file (by acrobat reader 6.0), windows always run a program "Microsoft office professional edition 2003 installation", and then demand me to give the correct path into the set-up folder or insert office CD to install bla bla bla...but even after I already inserted the disc, I still couldnt solve the problem. Notably, after I press the button "cancel" continuously for 3/4 times, the question box stops and acrobat reader runs. However, lateron the problem keeps occurring.HELP ME!