I am using Reader X on Windows Vista. I received a comment enabled file from a client and when I bring up the PDF, I cannot use any of the tools or text editing features to make comments on the PDF. I know this file works fine because I also have a iMac running Reader XI and I can make all the edits I want using the tools on that computer. I just want to be able to use my PC running Windows Vista to make changes to the PDF.
It also looks like I cannot upgrade to Reader XI on the PC using Windows Vista. The latest I can use is Reader X.
Thanks!