How to Lock Windows using USB Drive

Windows Security is the major issue now a days. Although 
everyone is worried about the security of his windows. Several 
softwares have been invented to protect data from being theft 
but either these softwares are 

very costly or are very difficult to understand. For the
 convenience of the User a trick has been discovered by me to 
protect your data from being 

theft which is "Lock your Windows using USB Drive".
Every body uses his USB Drive to store their data in it. But no one can think that 
this Small device can protect your PC. Anyways come back to the point, T
he logic is simple when ever                              

you start your PC it searches for the Boot device which is being saved in BIOS. 
Your hard 

disk is assigned as the primary boot device by default. When it founds the device
 then computer searches for the Boot.ini file which contains the basic necessary 
Boot Information. 

So if you can somehow remove/rename the boot.ini file and save it within your 
USB Drive 

then you can possibly use this USB Drive as the passkey to boot your PC. This trick 

currentaly work with the Windows XP only.

Lets get started, First we have to configure the Windows XP to configure it follow the 

following steps:

1. First open the Folder Options, to open it you need to open any window either
 My Computer 

or Any HD Drive. Then Click on Tolls>Folder Options>View. Now simply do the 
following step mentioned in snapshot.

Uncheck all the Marked Fields

2. As the hidden system files get displayed, you will need to find the following files

• boot.ini
• NTDETECT
• ntldr

3. Copy these files into your formatted USB Drive that you will use to lock your PC. 
As the files are being copied just remove the USB Drive.
4. After this rename the Boot.ini file to Boot.ini.bak. It will insure the backup of the 
original Boot.ini

 file which will be used to Revert back all settings.
5. Now we have to proceed to configure the Boot Priorities in BIOS. To open the Boot
 Priorities 

Restart your PC and press the F8 key to enter into your BIOS Settings. Though for 
some 

PCs F10,F12 and DEL keys are also assigned for BIOS Settings. If you are not sure
 about the

 Keys then you may have to read your Hardware Manual. As the BIOS Settings page
 opens 

Proceed to BOOT Priority and assign the USB Drive as Primary Boot Device.
6. Now Save settings and Exit the BIOS Setting Menu.

     Restart your PC without inserting the USB Drive, If your PC shows a Boot Error 
then it means

 that Boot.ini file is properly Renamed. Now insert the USB Device and Restart the PC.
 You will 

see that your PC will run properly same like that as it run earlier.

That's It all every time you have to use your USB device to Run the Windows.

To Revert Back:
To revert back all the settings simply by RUN the Windows and rename the Boot.ini
file as it was 

before. There is no need to change the Boot Priority Settings. That's all remove you 
USB Drive and restart PC without inserting it.