How to clear the computer password?

Network administrator in the maintenance and use of computers, often encounter a variety of password loss, here, we have for the vast number of network administrators prepared a number of methods to crack the password, but I hope that we do not do bad things oh. The power-on password is our first to encounter so we start with the CMOS password cracking. Although the types of CMOS are different, their encryption methods are basically consistent. The general crack method mainly from "hard" and "soft" two aspects to carry out.

First, CMOS crack

Use the computer, the first need to boot. So the power-on password is the first thing we have to encounter. Although the types of CMOS are different, their encryption methods are basically consistent. The general crack method mainly from "hard" and "soft" two aspects to carry out.

1. "Hard" lifting method

The hardware method to unlock the CMOS cryptography principle is the Cmosram on the motherboard for discharge processing, so that the parameters stored in the Cmosram can not be the normal power supply resulting in the loss of content, so as to unlock the purpose of the CMOS password. Some newspapers and periodicals on how to crack the common practice of CMOS password, such as jumper short connection method and battery short access method has been more introduced, operation is also very convenient. But we are here to introduce an alternative technique, this is also some computer DIY are very like to use the method. The method is also simple: Open the chassis, remove the hard drive or CDROM, floppy drive cable from the motherboard, and then start the computer, the BIOS will report errors in the Self-Test and automatically enter the CMOS, you can reset the BIOS content.

2. "Soft" lifting method

Strictly speaking, "soft" unlock the CMOS password is not "hard" to remove the method so thoroughly, but also very effective. The CMOS password, as required, can be set as a common user password and a super user-level password. The former only limits changes to the BIOS, you can start the computer and run all kinds of software, while the latter is completely prohibited to enter the computer and BIOS.

1 Crack Ordinary user password

Start the computer with a DOS boot disk, enter the DOS state, in the DOS command line input debug return, and then use any of the listed methods of data to unlock the CMOS password, restart the computer, the system will tell you that the CMOS parameters are missing, requires you to reset the CMOS parameters. After trial, this is a very effective method. The letter "O" after the "-" indicates the address of the numeric output, 70 and 10 are numeric values.

2 Crack the Super user password

Here we need to use external tools. We choose the most classic Biospwds, is a free software, more suitable for DOS not familiar with computer users, long ago for people well-known, as long as a little bit, will be the user's CMOS password display. Tool Latest Version 1.21,127kb, free download address: http://bj2.onlinedown.net/soft/8107.htm. After decompression, double-click the software's execution file, in the appearance of the interface click the "Getpasswords" button, a little wait two or three seconds will be the bios of the various information displayed in the Biospwds interface, including: BIOS version, BIOS date, use password, etc. At this point you will be able to easily learn the BIOS password.

Second, break the system password

The system password is the password you use to log in to the operating system, and it provides a security for your computer to protect your computer from the use of illegal users and secure your computer and confidential data.

1. Windows98/me's System login password

① Cancellation method

The simplest way is to enter the password when the system is logged in, you do not have to input, click Cancel directly, you can enter the operating system. However, you can access only the resources of this computer in this way, and you will not be able to access network resources if the computers are part of the LAN.

② new users

When you are blocked out of the system because of a password problem, you may want to add another user to the system and log in again, as you can log on to the system and access the system or network resources. Click Start/Settings/Control Panel, and then double-click Users to open the User Properties dialog box. Then, follow the prompts to enter the desired content in user name, password, personalized item settings, and then click Finish.

③ Delete "PWL" file

Remove the} from the Windows installation directory. PWL password files and all the personal information files in the Profiles subdirectory, and then restart Windows, the system will pop up a password without any user name box, we do not need to enter any content, directly click the "OK" button, the Windows password is deleted.

④ Modify Registry

Run Registry Editor, open the registry database "Hkey_local_machinenetworklogon" branch of "username" modified to "0", and then reboot the system, you can also achieve the purpose of removing the password.

2. Crack windowsnt Password

If you have a regular user account, There is a very simple way to get the Ntadministrator account: First C:winntsystem32 under the LOGON.SCR renamed Logon.old Backup, and then the USRM 瞘 r.exe renamed LOGON.SCR and restart. LOGON.SCR is the system boot loading program, reboot, will not appear in the previous login password input interface, but User Manager, then you have the right to add yourself to the group of administrators.

3. Windows2000 Password

Boot disk to boot the computer or boot into another operating system (such as Windows98), find the folder "X:documentsandsettingsadministrator" (X is the disk of Windows2000), the folder under the " Cookies "folder is deleted, then restart the computer, that is, you can quickly log on to Windows2000 with a blank password.

4. Break Windows XP Password

When you start Windows XP, press F8 to select Safe Mode with the command line, and you can use the net command to manipulate the user's identity. The steps are as follows: Use the command "Netuserabcd/add" to add an ABCD user, use the command "Netlocalgroupadministratorsabcd/add" to elevate the user ABCD to administrator, restart the computer, Log in as ABCD, and finally password modification can be made to the user who has forgotten the password.

Three, cracked several commonly used software password

At present, more users understand the use of computer software to their own stored in the computer information to encrypt the operation, so that people do not have the right to read the important information can not easily open. Let's take a look at a few common software password release:

1. Crack WPS Series Password

If you are a legitimate user, when you forget the password, start the WPS program, click the "File"/"Password Settings" menu, in the Password Settings dialog that appears, you can see that the original password will automatically appear in the Password text box with the "}}" number, click the "Clear" button, and then click "Confirm" in the prompt box that appears. button, the password for the encrypted file has been cleared. You will no longer need to enter a password to open the file again later. If you are not a legitimate user, you can only use the tools to crack. Now cracked wps password software a lot, but on its powerful, crack fast will be a few domestic Edward ' Swps2000passwordrecovery. The tool to crack the WPS password is a common way to crack the password ——— exhaustive method. Use the following steps: First, in the program interface in the "En 瞔 ryptedwps2000file" text box through the right side of the "Browse" button to add the need to crack the WPS encryption file, and then select the password cracking method, the software has the following types of password cracking: Brute-force ( Brute force attack), Dictionary (dictionary attack), Mask (mask search) and so on, generally choose the "Brute-force" (brute force Crack) method, and then in the "Brute-forcerangeoptions" list box, select the crack password can contain the range of passwords, For example: uppercase and lowercase letters, numbers, whether there are spaces, special characters, and so on, but also to specify the password length, such as 6-bit or longer; Finally, when the above settings are complete, click the "RUN" option, the password quickly cracked.

2. Crack Word Document Password

Perhaps Microsoft Office is so compelling that it has a lot of cracked software. Let's take a look at how to crack its document password. We choose a domestic software "97/2000/xp password Viewer", which is only a 29KB size of the micro-Simplified Chinese word password release software. This software does not need to be installed, you can double-click the executable file. The tool can crack win 瞕 ows9x/nt/2000/xp full range of document passwords, you can find a maximum of 13 digits (the unregistered version only supports 3-bit), using the "dictionary" method of exhaustive crack. Click the "File"/"open" command in the program to add the need to crack the document; To set the password type in task properties, it is recommended to select all of the options, fill in the password length, click "OK" to return to the main interface, and select "Operation"/"Start cracking command to password crack."