line of blue/green dots on laptop screen

[rameshllightpro]

Recently when I use chrome web browser a line of blue dots appear at the top of my laptop screen and they disappear when I minimize chrome.They appear sometimes and sometimes they don't.
So what should I do to get rid of them?

 

[rameshllightpro]

MERGED QUESTION
Question from rameshllightpro : "line of blue/green dots on laptop screen"

Recently when I use chrome web browser a line of blue dots appear at the top of my laptop screen and they disappear when I minimize chrome.They appear sometimes and sometimes they don't.
So what should I do to get rid of them?