Memory card cannot be read

Perhaps you can try taking the memory card out of the camera, insert it to your computer and run a photo recovery program. If you appear to be a Mac user, feel free to try this Photo Recovery app.
http://www.leawo.org/photo-recovery-mac/

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER

If your photos and videos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer.
Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER
If your photos and videos are stored on the memory card, then remove the memory card from the camera and insert it into an USB memory card reader. Connect this USB memory card reader and memory card into the USB port of your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos and to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

If your photos are stored on the memory card, then removethe memory card from the camera and insert it into an USB memory card reader.Connect this USB memory card reader and memory card into the USB port of yourworking computer. Your computer will see this as an USB Mass Storage Device oran external storage device; you can then open the folder on the memory card andcopy the photos to your computer.Memory card reader is a handy device and is inexpensive. Youcan copy photos from other cameras and you can also download photos off yourmemory card to someone else's computer without the need of installing anyprograms.

Is this a new problem - that is, did it work in the past? Are you trying to import jpeg or raw?

First thing is to see if it is iphoto or the camera that has a problem.

Try uploading the images to another computer (try a PC - not that it is better, but PC is different). If the images can be seen & read there, the images are likely fine and iphoto may need an upgrade to read the format from the finepix s1500. Alternately, try copying the photos from your memory card (use a memory card reader) to your hard disk. See if another application can see the images (even use a word processor to import image), or e-mail the image to yourself and then use your web-browser to see the image.

If the camera images can't be read by multiple computers/multiple readers, then it may be that your memory card is corrupted.

Try NOT connecting your camera to your computer.

The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive, the same way you copy any other files. Or you can use any photo cataloging program.

Did your friend use the "safely remove hardware" function when removing your card from her computer? That could corrupt your card if she didn't. Try this...take your card to a store like Walmart that has a Kodak picture kiosk. They can usually read everything on a card. There, you can print the pics or even make a cd of them. Afterwards, format your card in your camera.

You can either leave the memory card in the computer and use a USB cord to plug the camera into the computer, or buy a memory card reader (about $15 from most stores) that will allow your computer to read the memory card

If the installation software provided along with the camera doesnt get installed or doesnt support Vista, then u should use a Memory card reader to upload the photos.
Please rate me for this solution.

Thankyou

a virus is present in your pc, infecting the memory card. I suggest that whenever your card leaves the camera and used in any computer or lab, always format the card in your camera not in pc cause this will gonna erase all the pictures including the virus. virus in cf cards wont destroy your camera but it will make it operates like crazy. Make it a standard operating procedure to always format card inside the camera.
Photolab will be able to read even a corrupted card.