Halp again! - late today, first Startup, Chrome opens then cursor inoperative and [View all]

flashing spurts all over the display, like rapid something/whatever moving horizontally and on down the display wildly. Sometimes i can move the cursor but it won't click to close windows or activate.

It's a laptop. Am typing this on phone. The problem just appeared right now on a day i was away and didn't use it all day, which is unusual.

Can key the Task manager but the flashing doesn't let anything click. Have force Powered off just to get out. Can't click on virus scan or anything.