Introduction: Use Your Old Usb Flash Drive As a Computer Lock

Picture of Use Your Old Usb Flash Drive As a Computer Lock
In this Instructable I will show you how to turn any usb or SD card into a lock for your computer.

Step 1: Download Predator

Picture of Download Predator

First thing first download Predator here:

Step 2: Open Rar File and Run Exe.

Picture of Open Rar File and Run Exe.

Once downloaded open file with winrar (or any rar file opener): 

Install and agree to the terms of use:

Step 3: Creating the Usb Key

Picture of Creating the Usb Key

Once installed insert a flash drive or SD car, choose which drive letter and press create key:

Step 4: Tour of Predator in Use

This video will show you how the program works

Step 5:

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now use your usb (or sd card) key pluged in to access the computer and un-pluged to lock computer, once the key is pluged back in a pop-up box comes for you to enter your pasword if you set one, if not your computer will automatically resume from when you un-pluged the key.

Step 6: VOTE FOR ME!!!!!

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Thanks for viewing my Instructable and remember to please vote for me in the USB CONTEST !!!!!!


limbo (author)2014-09-18


Just to give an alternative solution: USB Raptor (which is open source)

spyroot (author)2014-05-06

AVG aAntivirus found virus on .exe

yenscasper (author)2012-06-25

Open/read/scan/view/extract rar files with the aid of next source RAR Repair Toolbox

xxx 1253 (author)yenscasper2012-06-25

thanks yenscasper for posting an add to RAR Repair Toolbox!

digitallyinsane (author)2012-02-02

Dude. Print screen, paste into paint, crop and save as jpg, upload. That's what the button is for.

fhszfsfs (author)2011-08-02

you should simply use the "lock" button in windows next to the "shut down", "hibernate", "sleep" and "restart" buttons. why so much hassle.

vishalapr (author)2011-07-06

I used this to keep my computer protected from my cousin and it worked perfectly!Rated4.5*
Have a look at my latest ibles as well and rate and comment and maybe even vote!
Thanks in advance!

xxx 1253 (author)vishalapr2011-07-07

I'm glade this program helped keep nosy people and anoying family from messing with your computer. On my laptop I use my micro sd card in its adaptor because its small and hidden/ easy to remove if needed.

vishalapr (author)xxx 12532011-07-07

Cool!Have a look at my ibles!

xxx 1253 (author)vishalapr2011-07-08

I will look at all of your ibles I'm glade a pro has interest in my second ible

vishalapr (author)xxx 12532011-07-08

Its not that I'm a pro but its just that I like these kinda stuff I mean pros are just people who have payed money or won the membership in contests etc and I'm one of the pros who got the pro membership in a contest!

xxx 1253 (author)vishalapr2011-07-08

Well no matter I like that my peers are interested in what I do in my spare time.

vishalapr (author)xxx 12532011-07-08


aaahotdog (author)2011-07-07

It is a nice find, but it is not really computer security. It is basically just a way to lock your desktop which can be done by setting a password on a screensaver app. It is only going to keep people out of your pc if you are within sight of your pc.

SWV1787 (author)2011-07-07

is there a way to circumvent the protection if you lose the usb?

xxx 1253 (author)SWV17872011-07-07

yes set the program to not start at startup, then if you lose your key just open program and creat a new key( just to make sure delete the old key incase someone stole it). In the payed version you can un-cheek the task manager box then if you lose the key you can press control alt delete to open task manager and close the service

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