Let me help you out here buddy you want a external(meaning USB)Its about 1 inch long and it hides on the back of the computer.
The other option is a software you can by plenty of these at COMP USA
http://www.cutespy.com/hacker-pc-internet-spy/
Internet Conversation Logging [
screenshot] - Log both sides of all chat conversations for AOL/ICQ/MSN/AIM Instant Messengers, and view them in real time, as they are happening!
Window Activity Logging [
screenshot] - Capture information on every window interacted with.
Application Activity Logging [
screenshot] - Track every application/executable that was executed and interacted with.
Clipboard Activity Logging [
screenshot] - Capture every text and image item that was csent to the clipboard on the remote machine.
Keystroke Monitoring [
screenshot] - Track all keystrokes pressed [including hidden system keys!] and which windows they were pressed in. Keystrokes can also be passed through a formatter for easy viewing/exporting.
Websites Activity Logging [
screenshot] - Log all websites that were accessed on the remote machine.
We just had a debate over here about this
http://www.antionline.com/showthread...591#post683591 
Unsolved 
