How to Tell If Someone Has a Keystroke Logger on Your Computer
Keystroke loggers can keep a record of every key you press on your computer keyboard. For this reason, a keystroke logger can compromise any sensitive information that you type on your computer. Social Security Numbers, bank account numbers and personal passwords can all be stolen using a keystroke logger. If you think someone is using a keystroke logger on your computer, there are a number of ways to detect it.
Check for a hardware keystroke logger attached to your keyboard. Trace your keyboard cord to where it plugs into your computer. Remove any device that is attached between your keyboard and computer; it is probably a hardware keystroke logger.
Run a spyware check on your system. Download or purchase an anti-spyware program. Run a scan of your entire computer. Remove any threats that the program finds; one or more of them may be software keystroke logging programs.
Right-click on the taskbar of your computer and select "Start Task Manager." Browse through the list of running programs. Note any suspicious program names. Advanced keystroke loggers can hide themselves from being seen in the Task Manager, but less sophisticated programs may be visible. Click on any suspicious program and then choose the "End Task" button. Scan your computer for spyware again after you end the suspicious task.
Install a firewall on your computer. Force all programs to ask for permission before accessing the Internet. Some keystroke loggers may try to send logs to malicious users across the Internet. Deny Internet access to any programs you don't recognize.
Continue to check your hardware and scan your computer on a regular basis if you think someone is trying to place a keystroke logger on your computer.