No such thing as "default settings".
Blurr is caused by 1 or more of 3 things:
1 Long exposure - camera moves during exposure
2 Long exposure - subject moves during exposure
3 Poor focus - lens incorrectly focussed.
To correct number 1 - use a tripod, use flash, increase ISO, open lens aperture
To correct number 2 - use flash, increase ISO, open lens aperture
To correct number 3 - be sure the auto focus is selecting the correct part of the image, use manual focus, use small aperture to increase depth of field.