You may be the only user, but that doesn't mean that you are operating from an administrative account. If you are installing from an admin account, for some reason it doesn't agree. Create a new admin account and see if you can then install Reader.
I just double check... my account is an adminstrative account... do I still need to create another adminstrative account to handle the issue?
I haven't had much experience with Windows 7; can you try to run the installer 'as Administrator' (in earlier Windows versions you right-clicked on it, then 'Run as...').
I don't need administrative accounts to install other software. And I DO NOT give
Acrobat any administrative rights on my computer.
Learn to write software. I swich to another reader.