I was just on Facebook and now here... the screen is shaky... like someone was snapping photos. Do you know what this is about. It doesn't happen all the time.

Check your refresh rate in your display settings, increase/decrease slightly see if it helps.

See if there are any firmware updates on the manufacturers website.

This can be the tell-tale signs of a graphics card failure too.

Thank you for taking the time to reply... I'm afraid I'm technically challenged in a serious way.. I don't know what refrest rate means... I don't know what firmware is or a graphic card... but thanks anyway... the shaking went away on its own