Please help me with my hp laptops keyboard!

HELLO' I NEED HELP WITH MY HP LAPTOPS KEYBOARD. WHEN I TYPE WItH THE CAP LOCKS ON' THE LETTERS BECOME SMALL LETTERS. AND WHEN I TYPE WITH THE CAPS LOCK OFF' THE LETTER BECOME CAPITAL LETTERS. AND WHEN I PLACE THE ACER ON THE PAGE' THE WHOLE PAGE GET HILIGHTER' AND I CAN'T UNDO It. WHEN I CLICK ON THE ICON ALL THE ICON BECOME SELECTED. YOUR SUGGESTION IS VALUABLE TO ME. THANKS.