|There is a difference between .jpg and .jpeg (which is why I suggested you search for *.jpg rather than *.jpeg). Honestly, if you search for *.jpg like I said you will find stacks of them. Almost all pictures will have the extension .jpg although you won't actually see their extensions if you have them hidden.|
Anyhow, if you can go to My Pictures, double click a picture and it opens up then that is fine. Can you confirm this is the case please because I didn't undestand what you meant by "all of them are open"? At the same time could you tell me the name of the program in the top blue bar when you are looking at a picture? I doubt it will be HP Photosmart.
When you go to My Pictures, If you only see the file name without the .jpg bit, then it would be a good idea to "show extensions". You do it like this:
Go to Start button, Control Panel, Folder Options, View tab. Scroll down until you find the entry "Hide extensions for known file types". If there is a tick in the box then untick it and Apply/OK your way out. Your pictures will now have .jpg after their name and this part (the extension) should never be altered. It tells you what sort of file it is which is well worth knowing. It will also assist when looking further into your problem.
Shout back and we'll hopefully be able to move on to see what the camera is producing.
Ms Hulot goes horse riding