I'm running windows 7 on my lap top (64 bit) and installed Adobe Reader 10. I use Sibelius software to write music. In the In the Sibelius Menu bar is a "Help" button. When you click on this the reference books (on PDF's) that are provided are suppose to open up. This is not hppening.
When I go to the Adobe file and right click I see at the bottom "Properties" it is in this area that I believe I'm suppose to give Adobe Reader 10 permissions to open PDFs. I'm not sure though what exactly needs to happen.