Lost pictures I had about 103 photos taken and there was no sign that my card was full or anything. I was taking a photo and then all the photos were gone. All it said was no images. I can not find them anywhere. I know I did not delete the photos. Can I retrive them from anywhere or are they just gone? I took several pictures with my camera and after I downloaded them, even though I did not erase them they are not visible on the card. Now, new pictures are not saved to the SD card, only to the random memory, and are lost after I turn the camera off.

You'd better not saved anything new on this camera, if you still want to restore your lost pictures back as many as possible.
In fact, after the deleting or formatting process, the deleted photos on this memory card are not actually wiped out as you normally think. They are still stored on this memory card and only become invisible. But, they cannot be there forever. They can be rewritten by anything new on the same memory card. So, you should take care.
Plunge this camera to your computer and download a photo recovery freeware to help you out:
http://www.freeware-fix.blogspot.com/2013/02/photo-recovery.html
I believe this data recovery freeware can work perfectly on your memory card just in the same way as it completely retrieves all the deleted data of my friend off from his camera memory card. Just give it a shot!
Directly download this freeware here:
http://www.freeware-fix.blogspot.com/2013/04/data-recovery.html
PS: If you don't want to encounter the similar data recovery problems, you'd better back up everything important well in the future.

I have taken several photos by using SONY Cyber-shot Camera(DSC-W150/W170) then my son undelibrately pressed somewhere. After a while the all photos which was taken by me disappeared from camera. Could you advise there any solution to retreive all the photos? Your advise on this issue is highly appreciated. [email protected]

You can run a check on that memory with Active File recovery to see if the pictures are there or not. If they are there you can get them back.

The free demo o this software allows only file smaller than 64kb to be recovered or you can use the online version which might not have the limitation but it might not see he memory stick not even if the camera is connected to the computer. There's possibility thought that it might see it if you connect it before starting the online version, the demo should see the card if it's connected.
http://www.file-recovery.net/