why can't I scroll to end of licensing agreement to check accept box
Try pressing Tab and then Enter.
If that dows not help, coudl you change your screen reslution to atleast 1024X768.
Have a look at the following document: http://helpx.adobe.com/acrobat/kb/cant-click-accept-acrobat-reader.htm l
It contains several issues that sound similar to the one you report.