My son has an old clamshell ibook which died. We took it in to be repaired and they put on OS X 10.3.5 . All was well until we brought it home and tried to download MSN's Messenger and Limewire. They won't download. I take that back. They seem to download, but on Limewire for example, when I click on the page to install it, nothing happens. What is going on here? We were able to download these programs before the repair shop re-installed the operating system. Help!