I am running windows 10 Prof on both a laptop and desktop. I have a problem that may or may not be related to Norton 360. When using the keyboard input the characters on screen do not follow the input consistently. Sometimes the characters on screen lag behind the input. The characters eventually catch up with the input. It seems that something is checking the input in the background or a background process is running that interferes with keyboard and mouse input. I have run scans using both Norton 360 and Malewarebytes; both come up negative. The problem persists even in "Safe Mode". Is there any background process triggered by Norton 360 that could interrupt keyboard/mouse input?