I've installed Acro Reader to view PDF files, but the vertical scrollbar isn't working. When I scroll it, it has no effect over the PDF file. However, I can navigate the files using the arrow keys or PgUp/PgDn.
So I installed Foxit reader to overcome this issue, and to my surprise, the same problem happened. I can't scroll down the files using the scrollbar.
The strangest thing is that this issue only occurs in AcroReader and Foxit. Every other application works perfectly.
Does anyone have an idea to fix this?