Thanks for the suggestion. We looked into that possibility but it won't work.

Yes, we did get the PC back on line, no problem. We also now have a laptop on-line via wireless router, so I do have on-line access. If I really need something from the internet for my imac, I download it onto a SanDisk. Then I download the SanDisk data into the imac. It's an extra step but better than nothing.