Problem with a digital camera..?

I got a camera from a friend but she didn't have the cd to install.. I went online and bought the software to the canon powershot A75 digital camera... I installed the software and that works fine.. But when i hook up the US B port cord from camera to tower ... I open the program Zoom browser and click up load camera and then it closes that program down and windows tells me it can't detect camera.. I have tried to uninstall and reinstall many times.. Have no idea why.. Plz Help

I agree with Terisu and have been using a card reader for years now. Vote for her as the best, but here are the details.

If you get a card reader, no additional software is necessary. This is not only faster, but it saves your camera batteries. Your computer or printer may even have a card reader built into it. I have enough USB ports that I just leave it plugged in all the time.

First of all, be sure there are some pictures on the card. Plug the card reader into an open USB port. Plug the card into the appropriate slot on your card reader. I use Photoshop Elements and as soon as I plug my card into the reader, it starts its own card reader and displays a thumbnail of every picture on the card.

If this does not happen automatically, open your photo editing software. Do whatever you usually do to open a file, but click on the selector where you can change drives. Your card reader will be assigned a new drive name that will be one letter higher than you ever saw before, such as "Drive G:" or such. Then, just double click on the name of the file you want to open and it will appear in your photo editor.

First, make sure you have your camera turned on. Then if it still isn't recognized, try a new usb cord.

Or you could just skip the software. You don't really need it. Just buy a card reader, and your computer will read the images straight off of it. That saves drain on your camera's batteries anyway.

You might try going to start (bottom left) and go to "all programs", then go to the canon utilities and then zoom browser and and see if it will work from there.

Is this happening after you've copied your photos from your camera's memory card to your pc? Are you safely removing the USB Mass Storage Device before you turn your camera off and disconnecting the USB cable? You can run into problems if after you've transferred your pics you are just unplugging the USB cable without safely removing it. You must remove the camera from the system before disconnecting. Not enough info to be certain that is your problem.
Also, you could have a bad USB Cable .........

I agree, the camera must sometimes be turned on for you to be able to download the pictures. Also, if you used the CD that came with the camera then all the needed software would have installed to you computer.

However, if you downloaded the software, make sure you got both the WIA driver along with the Zoom browser program. Although your computer probably would be able to "see" the camera with the WIA driver software alone (in mass storage mode), it would not be able to "see" it if you only got the Zoom Browser.

And as the rest have said, get yourself an inexpensive USB card reader, it's loads more convenient.