Dark "splotch" appeared on screen

My laptop is maybe 2 years old, its a Presario C300 widescreen.

A dark spot appeared on the bottom right of the screen about the cursor wide. Its not a dead pixel and I don't think its burn in. It is way to dark. Pixels can be seen though it, but its under the surface. I am at a loss as to what to even call it to start to find a solution.

It almost looks to me as if there was dirt under the screen.
 
lcd fluid is cracked and leaking. you'll have to replace the lcd. You can get a kit or get it repaired. I suggest the latter.
 
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