adobe pdf pack. how can i get adobe reader free on computer?
Ok, there is no serial number for PDF Pack, and nothing should ask you for one. I wonder if you are trying to install Adobe Acrobat instead?
If you want to install Adobe Reader you can go to http://get.adobe.com/reader . You will be offered extra free stuff, take care to turn this option off.
If that doesn't work please give us detailed error messages.