With your camera plugged in and turned on, Right click on Start>Explore. Scroll down in the left column until you get to the drive letter that is your CD drive – probably “D”. The next drive letter should be a “removable drive” or “camera”. Left click that drive and keep left clicking the folders that show up in the right column until you have a screen full of images. Edit>Select all. Right click on one of the highlighted images and select “Copy”.
Now navigate back up to a folder where you want the images. You can make a folder by left clicking Start>My Documents>My Pictures. With the contents of My Pictures showing and nothing highlighted: File>New>Folder. Type a name like “Bubba 12 June 05”. Right click on your new folder and select “Paste”. The images will copy to the folder.
Most people transfer the files that way after they gain some experience. It is much better than going through a program. If the files will transfer that way there isn’t anything wrong in your camera setup. That would probably leave the problem in ACDSee. It is possible according to your operating system that you might be able to both uninstall ACDSee and delete your TWAIN files, then reinstall ACDSee. I wouldn’t do that if you can download directly from the camera to your computer.
If the camera when connected and turned on does not show as a drive letter you will have to give us some information.
Were you ever able to download using ACDSee?
If so, what have you installed or added since?
Were you ever able to download from the camera in any way?
What camera and operating system?
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Digital Photography & Imaging 
