Thank you Kees_B for yor reply. I'll tell you what I can about how this thing seemed to work in the XP computer. It came with a CD sized and shaped disc that says on it.... Driver......MD9721.... 4.1mega-pixels.....Driver for Windows 98/98SE/ME Windows 2000/XP MacOS8.6/9.0.4. Put the disc in the cd player and the machine did some stuff, and evetually a shortcut icon showed up on the desktop. When you clicked on the icon, a page (?) came up that showed the Medion logo, a bunch of spaces that looked like squares of film only all blank, and on the side were things like 'select all', and 'exit', 'reload', 'download to computer', etc. To get photos out of the camera, you turned the top dial on the camera to 'PC', then connected it to the computer with a USB cable, turned on the camera, and then hit the camera icon on the desk top.
The previously described 'page' would show up, and the photos would automatically start showing up in the previously blank 'film squares', or you would hit the 'download to computer' button, and then the photos would start to show up, I honestly don't remember which way it was, other than it was pretty easy. When I got my new computer, I put the MD9721 Driver disc in the cd player and it did it's thing, and eventually the camera icon showed up on the new desktop. But now, when you do all of the stuff to get the photos out, nothing happens. The blank film squares 'page' shows up, but no transfer occurs. The computer doesn't chatter about or to the camera, you know what I mean ? It doesn't seem to recognize that there's a camera hooked up to it.
Yes, I did go to the Medion site...... I can't say for sure 'cause I'm so bad at figuring out computer stuff, but it seemed like I didn't find what I thought I needed to update or install some sort of patch to address this problem. Not saying that there isn't an actual answer there, just that I didn't find it.
At the beginning of your reply, you listed four questions to me about this problem, and my reply to you is that I think it might be a combination of #'s 3 and 4. Thank you for your assistance and patience.