Circle on the screen

[RauloAST]

hey guys i just noticed that my screen shows me a yellow circle, it doesn't move or something, and its transparent, would someone please explain me what is it, and why its there

link for image
http://postimg.org/image/nhjuz7zpf/

 

[RauloAST]

False alarm guys, i found the reason of it showing up.

 

[g-unit1111]

Weird, I've never seen anything like this before. Doesn't indicate that it's a dead pixel. What monitor are you using?