I have some pictures taken with my sony digital camera.They are blurry,Is there any way to fix that?
Sadly, you can not invent new detail in post production. If it is very slightly blurry, sharpening can make it look a little better by making edges stronger, but there isn't any actual gain in detail. Whatever level of detail you have is the level of detail you will get. Post production tools don't have anywhere to get what the information should have been for those pixels, so it can only work with what it has.
It will be nearly impossible to completely fix blurred pics in post.
If you are concerned about avoiding this in the future, you need to figure out why they were blurry. Was it low light and the camera speed was too slow for hand holding? Were you not appropriately steady when you shot it?
Or are all pics from this camera blurry? In which case, it needs service.