It sounds like the install file becomes corrupted during the download. AOL can very well have something to do with it. What you use to download the file may also have something to do with it.
You can try downloading the file with another browser.
For example:
Are you using Internet Explorer to download it? Then try Firefox.
Are you using Firefox? Then try Internet Explorer.
It may work but there is unfortunately no guarantee
There is also the possibility of bad sectors being the cause, but that is unlikely considering the age of your computer.
*hugs*