Why does my digital camera take blurry pictures?

I have a Nikon Coolpix Touchscreen (S4100) and I love it. But everytime I take a picture, its really bad quality! I've tried changing settings, turning flash on and off, but nothing is working! What's wrong with it? This camera was over $100, and the pictures are really bad. How do I fix it? Please help!

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Canon PowerShot SX20IS or Nikon Coolpix P90?

I'm stuck! Which one do I choose?
Added (1). I'm leaning towards the nikon because it's cheaper. Please give me any reasons why I should choose a certain one.

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NEED A REASONABLE HD CAMERA!

I was interested in starting photography. I'm not a professional, so I feel like I don't necessarily need an SLR or DSL camera. I want a camera with a pretty good zoom, phenomenal photo quality, but not over the top, and a camera that shoots in HD video. I was thinking about the Nikon P90, which has a 24x zoom, 12 megapixel, and standard 24fps video. Its still a point and shoot and I heard that the pictures can get a little fuzzy. Plus, it's not HD. On the other hand, I was considering the Panasonic Lumix DMC-FZ28, which is 10 megapixel, 18x zoom, and records in HD video. I want something that's no more than $350. If you have any suggestions please let me know. And remember, I'm not looking for anything professional. Thanks! :D--->--<

By the way, here's the links to the camera's that I was considering;

Nikon P90

http://nikonusa.com/Find-Your-Nikon/Product/Digital-Camera/26171/COOLPIX-P90.html

Panasonic Lumix DMC-FZ28

http://reviews.cnet.com/digital-cameras/panasonic-lumix-dmc-fz28/4505-6501_7-33175918.html

Read more: NEED A REASONABLE HD CAMERA!