What is your operating system?
If Windows, remove the corrupt Reader installation using http://labs.adobe.com/downloads/acrobatcleaner.html
then reinstall Adobe Reader.
OK, I did this and when I try to open Reader it pops a window up that says; Windows cannot access the specified device, path or file. You may not have the appropriate permission to access them.
I am the only one on this PC and I am the admin.
I appreciate your help.