This sounds like a malfunctioning touchscreen. The white spots are where the OS is detecting touch input and its providing visual feedback in the form of these white spots.
See if you can disable touch input. That will allow you to bypass the problem for now.
After that you should download HP Image Assistant and get your drivers up to date.
Clean your screen, make sure there's nothing on there that might register as input.
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Have you tried booting up in Safe Mode and /or disconnecting Wi-Fi to see if the problem goes away?
crwdns2934271:0crwdnd2934271:0 mike crwdne2934271:0
Booted in bios but the touchscreen cursor or mouse pad /track pad cursor keeps moving and selecting options randomly
crwdns2934271:0crwdnd2934271:0 SHARAD GOELA crwdne2934271:0
Tried disabling the wifi adapter by removing the hardware connection wires, keyboard and track pad, but doesn't solve. Laptop motherboard heating up
crwdns2934271:0crwdnd2934271:0 SHARAD GOELA crwdne2934271:0