Common password cracking methods in Computer Operations

I. Forgot the system password
If you forget the system password in the CMOS settings, you will not be able to start the machine. The solution is to open the chassis, remove the battery, connect the positive and negative poles, and discharge the CMOs, clear all the content in CMOS (including the password, of course), and then restart the system to set it.

Note: For some motherboard With the CMOS Password clear jumper, refer to the motherboard manual to transient the jumper, so that the CMOS password can also be cleared.
 
Ii. Forget the setup Password
If you forget the password, you cannot set CMOS. If you can use a computer but cannot enter the CMOS settings, you can solve this problem: Start debug in DOS state, and then enter the following command to manually clear the setup password:

_ O 70 16

_ O 71 16

_ Q

You can also use the CMOS password cracking software to display the CMOS password. There are many such software, such as cmospwd (click to download ), it supports various BIOS such as Acer, Ami, award, Compaq, Dell, IBM, Packard Bell, Phoenix, and Zenith ami. The CMOS password is displayed when the program is started in DOS.
 
3. Forget the Windows logon Password
Countermeasure under winme/98: Press F8 to start DOS, and then delete *. the PWL password file, and all the personal information files in the profiles subdirectory. After windows is restarted, a password setting box containing no user name is displayed, without any input, click OK to delete the logon password.

In addition, modify the userprofiles under the HKEY_LOCAL_MACHINE, network, and logon branches of the registry database to "0", and then restart Windows to achieve the same purpose.

Countermeasure under WINXP/2000: Delete the Sam file under the system installation directory/system32/config and restart the system. At this time, the Administrator account has no password and logs on to the system with the administrator account, you do not need to enter any password. after entering the system, you can reset the Logon account password.
 
4. Forget the Windows Screen saver password
Solution: Press F8 after the instance is started, select safe mode to start, enter windows, right-click the blank area on the desktop, and select "properties"/screen protection from the shortcut menu, cancel "password protection.
 
5. Forget the Windows Power Management Password
You can also set a password for the Windows power management function. When this function is enabled, the system requires a password when it returns from the energy-saving status.

If you forget the password, you can use the method used to crack the Windows logon password.
 
6. Forget the Microsoft Office Password
Solution: use the software to crack the password of office documents, there are a lot of such software, such as aopr (download URL http://www.elcomsoft.com /), this software can simultaneously crack the passwords generated by Microsoft Office series Word, Excel, access, and other software. It can also crack word *. search for the password of the dot template file.
 
7. Forgot the WinZip compressed package Password
Solution: use the software uzpc (ultra zip password cracker, click to download) to retrieve the lost password. When using the software, you must first set an appropriate decryption method, such as "backdoor mode", "exhaustive mode", "dictionary mode", and "pattern matching mode, generally, the "brute force mode" is used, and the software tests all possible passwords until the final result is found.
 
8. Forgot the RAR compressed package Password
After forgetting the RAR compressed package password, you can (Click here) download a crark software to crack it. It mainly uses the command line to crack the RAR compressed package password. Generally, you only need to use the "crark RAR compressed package file name" command directly and use the default parameters to crack it.
 
9. Forgot the QQ/ICQ Password
To protect your QQ password, you must apply for password protection. If you forget your QQ password or the password is stolen, you only need to enter the correct information to retrieve it.

If you want to retrieve the ICQ password, you can use the software ICQ password revealer (http://www.encrsoft.com/), this is a DOS command line utility, you only need to execute this file in the newdb sub-folder of the ICQ installation folder, and enter your uin as prompted on the screen. The system will retrieve the "long-overdue" ICQ password.
 
10. Forget the OE Password
If you forget your password and cannot access the emails received by Outlook Express or use the address book, you can restart the computer, press F8, and select "safe mode ", you do not need a password to start OE again. Then you can create a new user (you cannot change the password) and import the information to the new user mailbox.
 
11. Forget the Foxmail account password
 
Author: www.mop.com: Walking 28
Solution: Eliminate the password of the forgotten Foxmail account. First open Foxmail, create an account (any account name, such as lacl1), and then exit Foxmail. run Windows Resource Manager and find the Foxmail/mail/lacl1 folder, which contains an account. stg. "STG" file; then run Foxmail again to open the account that forgot the password. Why is there no "password prompt box? Now you can directly open the account with the password forgotten, and there will be no less emails in the account!
 
12. view the "*" Password
 
Many passwords are displayed as "*" on the screen, so we cannot directly see the original characters of the password. If you use software dedicated to cracking the "*" password, you can find out the original characters of these passwords.

There are a lot of such software, such as iopus password recovery (click to download) available under win2000/Win98, password spectator pro available under WINXP (click to download ). When using the tool, you only need to open the "*" window, start the software, press the ctrl key, and press the left mouse button in the password column, the original characters of these "*" passwords are displayed.