Easily crack a laptop with a lost Password

For a laptop, it is best not to set the password easily, because the boot password of the laptop is not stored in the CMOS circuit as the PC can be cleared by discharge, currently, newer laptops Store Passwords in several logic circuits on the main board, which cannot be cracked. (for this series of computers, the password can be added to three layers, each layer is encrypted for different devices. If the set password is lost, the computer may be configured.) If you want to crack the password, it may take a lot of money.

However, for older laptop models, you can try the following methods to remove the laptop boot password: first, change the hardware configuration of the machine, for example, remove the hard disk, restart may automatically enter the Setup program and clear the boot password. Second, you can try to find a chip on the motherboard. This chip is commonly known as the 818 chip. It is generally "MC146818" with 24 pins, transient 12th feet and 24th feet for 1 second, you can also find a chip labeled "MC14069" and pin it to the ground to clear the password.

If you forget your password for a Toshiba laptop, you can use the password service floppy disk to solve the problem. (The password service floppy disk is generated every time you set or modify the boot password. Please keep it properly ). The procedure is as follows: Insert a password service floppy disk into the drive. Press Enter and the following message is displayed:

Set Pass Again? (Y/N)

Press Y to run the TSETUP program and set a new password. Press N to restart the computer.

Note: The Password service floppy disk must be inserted into the drive; otherwise, it will be returned to Password =. If a floppy disk has been inserted into the drive, the message still appears, and the password service floppy disk may be faulty. In addition, when using the password service floppy disk, pay attention to the following two issues: If the BIOS boot priority is set to hard drive or optical drive, press the reset button and press the F key to ensure boot from the floppy disk drive. If the computer is in the recovery mode, the password service floppy disk does not work when the power is turned on. In this case, press the reset button first.

For older Toshiba laptops, there is a "backdoor" in the BIOS password protection ". You can try the following method to bypass the Toshiba notebook BIOS password restriction without entering any password for authentication. Prepare a formatted empty floppy disk, another computer, a binary editing software (such as Norton DiskEdit or UtralEdit 32 ). The procedure is as follows:

1. start another computer, open the binary Editor, insert the floppy disk into the drive, modify the first five bytes of the first sector of the floppy disk to: 4B 45 59 00, note that the Boot Sector is 0th slice. Do not correct it. Save the modification and now you have a key disk. Insert this floppy disk into the drive of your laptop and press reset to restart. When you are prompted to enter the password, press Enter. The system prompts you to set the password again. Press "Y" and press Enter. Then you can see the BIOS setting interface, and you can reset a new password.

2. the laptop is toshba, which can be easily used to clear the password through the print port of the computer itself.

Join: 1 to 5 and 10, 2 to 11, 3 to 17, and so on.

 

1-5-10

2-11

3-17

4-12

6-16

7-13

8-14

9-15

This table is an interface on the computer motherboard. Note that the external interfaces are the opposite.

If the method described above does not work, you only need to send a laptop Professional repair point to use a special method to handle the problem. If the warranty period expires, you will only be able to cut the price. Therefore, there is no special reason. Do not set a boot password for your laptop. To ensure data security, we recommend that you install the WIN2000/NT or WINXP operating system and use the NTFS format partition. In this way, system installation is better than simply setting the boot password. Some laptops now provide fingerprint boot identification systems and other installation measures to replace the traditional BIOS password protection.