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If you have installed ,or reinstalled, Windows from scratch, the drivers for the card reader may not be built into Vista, and if so you need to install the specific drivers for it, available in the downloads for your specific Inspiron model on the Dell web site. In any case, you must install the main chipset drivers for your mboard after having installed, or reinstalled, Windows from scratch.
The circuitry of older memory card readers cannot recognize newer larger capacity memory cards at all, but they'll recognize memory cards with smaller capacities fine. The Owner's manual and/or the specs for your specific Inspiron model may tell you the details about which card types and capacities the card reader can read.
If your card reader can't read newer types of and/or higher capacity cards, externally connected card readers with newer circuitry can read them fine, and are relatively inexpensive.
Cameras are not recognized as a unique device / model by Windows until you have installed at least one program for the camera, which will install specific drivers for the camera model - if you have the CD or DVD that came with it, such programs are probably on the disk.
However, it's memory card can be read fine if you remove it and plug it into a card reader that can read that type and capacity of card fine.
Once the camera is recognized in Windows, any memory card installed in it that the camera can read will display the card's contents when you use any program, even if your built in memory card reader can't read the card.
You may need to plug the camera's USB cable into a different USB port in order for it to be recognized properly.
Troubleshooting USB device problems
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