How can i check whether my computer keystroke is being watched? i am the only person who has access to my laptop and i use McAfee antivirus and firewall. But i download many things from internet. Is it possible to install keystroke logging s/w in my computer through these download files from internet? if yes, how can i check my computer for keystroke logging s/w and remove it? I am worried about keylogging because my laptop screen flickers often and sometimes i see horizontal thin black line on my screen. Its a fairly new laptop with no previous problems and i don't know what is causing this? Should i be worried about keylogging?