I have been using the windows reader for months now to open files my teacher puts online for us to review. right before finals out of nowhere I am not able to open them. It lets me save the file, and when I go to open it, where it would normally open in the reader, it gives me an option of programs to open it in, none of which work. when I try to search the reader to open it in, I can not find it. Also the saved file is not shown as a reader file, it is just a blank page with a bunch of letters and symbols following. Normally all I would have to do is click the file link from my teachers web page and there would be the pop up for me to open or save it, and I would, and that was it. Now there is no way for me to view these new files or even my old ones in which I have previously saved as reader files prior to all these problems. I have already tried to uninstall and reinstall the reader and the problem is still present.

Try download and install Adobe Reader and save document and right click on it and open with Adobe Reader.

Run Windows Update and install all updates.