When using a computer, it is inevitable to deal with various passwords. The following nine passwords may be the ones that everyone uses the most: BIOS password, installation password, user password, power management password, screen saver password, power-on password, Internet password, hierarchical review password and shared password. Today, let’s talk about these passwords that are closely related to us. This article will first talk about the first five passwords of the nine commonly used passwords.
1. BIOS password
BIOS (Basic Input Output System) is the basic input/output system. It is actually a set of programs that are solidified into the ROM chip on the computer motherboard, providing the computer with the lowest level and most direct hardware control. Unlike other programs, BIOS is stored in the BIOS chip, not on disk. Since it is part of the motherboard, people sometimes call it a name "Firmware" (firmware) that is different from software and hardware. It is mainly used to store self-diagnostic testing programs (POST programs), system bootloader programs, system setup programs, and I/O drivers and interrupt service programs for major I/O devices.
If you don't want others to use your computer, you can set the BIOS password function to add a "lock" to the computer. What should I do if I forget my BIOS password? Don't worry, the following tricks can help you.
Depending on the user settings, the power-on password is generally divided into two different situations. One is the SetUP password (when using this method, the system can be started directly, and only requires the password to be entered when entering the BIOS settings); the other is the System password (when using this method, whether it is directly started or BIOS settings, it is required to enter the password, and without a password, nothing will be done). Our cracking method is different for the two passwords set by users:
(I) Cracking SETUP password
If the computer can boot normally but cannot enter the BIOS settings (that is, the SetUP password is set), then we have the following methods for you to choose from:
Method 1: Dubug method
After forgetting your password, just start Debug in DOS state, and then enter the following command to manually clear the password:
_ o 70 16
_ o 71 16
_ q
In addition, users who are not familiar with Debug can also download a tool software Cmospwd that specializes in cracking CMOS passwords. Then start the program on DOS, and it will display the user's CMOS password (Cmospwd supports Acer, AMI, AWARD, COMPAQ, DELL, IBM, PACKARD BELL, PHOENIX, ZENITH AMI and other BIOSes), which is very convenient to use.
Method 2: Software cracking
There are many software for detecting systems or boot passwords now, the most common ones include BiosPwds, Cmospwd, etc. Among them, BiosPwds is one of the best ones. It can detect BIOS version, BIOS update date, administrator password, CMOS password, password type, etc., and the usage method is simple. Click the "Get Password" button in the window to display all the information detected by BiosPwds.
However, since the software cracks passwords, it reversely decodes the BIOS-encoded passwords, so sometimes you may find that the program's password is not the same as the real password, which is also a normal phenomenon, so this trick sometimes doesn't work.
Method 3: Make your own files to crack
Enter the MS-DOS environment, enter EDIT at the DOS prompt and press Enter (if you find an error when pressing EDIT, it means you do not have this file, please see the next method), enter:
ALT+179 ALT+55 ALT+136 ALT+216 ALT+230 ALT+112 ALT+176 ALT+32 ALT+230 ALT+113 ALT+254 ALT+195 ALT+128 ALT+251 ALT+64 ALT+117 ALT+241 ALT+195
Note: When entering the above data, press the ALT key first, then press the numeric keys in the numeric keypad (the row of numeric keys on the keyboard is useless). After entering a piece of numbers, release the ALT key, and then press the ALT key. During the operation, a messy character will appear on the screen, so we don’t have to worry about it. Then select "save" under the "file" menu, save as a file, and then exit to the MS-DOS environment, find the file and see if it is 20 bytes. If it is not, it means that you have entered the wrong input and you must re-enter. After confirmation, run it directly. There should be no prompt information on the screen. Then restart the computer to clear the password in CMOS. Of course, other settings in CMOS will also be cleared at the same time, which requires us to reset it.
Method 4: Cracking under DOS
This method can be completed directly in the MS-DOS environment. Enter in the MS-DOS environment and enter, continue to enter the following ten characters: ALT+176 ALT+17 ALT+230 p ALT+176 ALT+20 ALT+230 q ALT+205 <Space>, then press "F6" key, then press Enter to save, and then restart the computer after running the file.
_info.asp?id=12392" width=1 border=0>(II) Cracking System password
If you cannot start the computer without a password (that is, you have set the System password), then we cannot solve the problem of password forgetting through software. At this time, you can use the following methods:
First trick: Universal password
Each motherboard manufacturer has a common password for the motherboard setting to facilitate technical support. If we know the universal password for the motherboard, then whether it is open
You can "pass through the wall" when you have a machine or CMOS setup. Of course, don't use this to do bad things!
It should be noted that for some reasons, the general passwords of motherboards of different periods will be different, so this trick cannot be passed around the world. We only try it a few more times. Whether it is useful depends on luck!
Award BIOS universal password: j256, LKWPPETER, wantgirl, Ebbb, Syxz, aLLy, AWARD?SW, AWARD_SW, j262, HLT, SER, SKY_FOX, BIOSTAR, ALFAROME, lkwpeter, 589721, awkard, h996, CONCAT, 589589.
AWI BIOS universal password: AMI, BIOS, PASSWORD, HEWITT RAND, AMI_SW, LKWPETER,.
Second trick: CMOS discharge
Most current motherboards use button batteries to provide power to the BIOS, which means that if there is no power, the information inside it will be lost. When it powers on again, the BIOS will return to the original state that was not set, and of course the BIOS password will be gone.
We first need to open the computer case and find the silver-white button battery on the motherboard. Carefully remove it, then unplug the power plug at the rear of the chassis, short-connect the spring blade on the bottom of the battery with a metal piece, and install the battery after about 30 seconds.
At this time, CMOS will lose the internal stored information due to power outage, OK! Replace it back, close the chassis and turn it on, and the system will prompt "CMOS Checksum Error-DeFaults Loaded", which will prompt you "CMOS found an error during the inspection, and the default value of the system has been loaded." The BIOS password was successfully cracked.
The third move: short jumper
If the motherboard's CMOS chip is integrated with the battery, or the battery is soldered directly to the motherboard, and we also use the second move "CMOS discharge method" and it does not work, then we have to use the jumper to short-circuit this move.
After opening the chassis, there will be a jumper switch near the CMOS battery on the motherboard. Next to the jumper, there will generally be words such as RESET CMOS (reset CMOS), CLEAN CMOS (clear CMOS), CMOS CLOSE (CMOS off) or CMOS RAM RESET (CMOS memory reset) next to the jumper, short-circuit it with the jumper cap, and then jump it back!
Since the jumper settings of each motherboard are different, it is best to check the motherboard instruction manual first when using this trick. I forgot to say something. When CMOS is discharged or cleared from CMOS, do not do it while the system is turned on. It is recommended to disconnect the computer's power supply.
2. Windows installation password
First, let’s talk about the installation password. The installation password is Windows CDKEY, which is necessary when installing Windows. It will be recorded in the registry after entering. Click "Run" under the "Start" menu, enter regedit to open the registry editor, and you will find that the Windows installation password is in the following location in the registry: HKEY_LOCAL_MACHINE＼Software＼
Microsoft＼Windows＼CurrentVersion＼ProductId and HKEY_LOCAL_MACHINE＼Software＼Microsoft＼Windows＼CurrentVersion＼ProductKey, if you forget the Windows installation password one day, you will know. In fact, this password is not important, it is just useful when reinstalling Windows and is automatically recorded here after installation. If you want to reinstall Windows and don't have the password, you might as well come here first and take a look and record it for later use.
3. User password
Regarding user passwords, many people have a misunderstanding, that is, they believe that user passwords are power-on passwords. In fact, Windows does not have a power-on password by default. So what is the user password used for? It is used to protect "personality"! The system allows multiple users to be set up, and the purpose is not to protect the user's privacy. Instead, a set of system appearance configurations are saved for each user to adapt to different user usage habits, just like the current popular "skins", just enter a password. So this password does not function as confidential at all, it is just a decoration.
The user password can be set in the "Password" or "User" tool in the control panel: In the control panel, double-click the "User" icon and click the "New" button. The "Add User" window will appear. Click the "Next" button, enter the newly added user name, and then click "Next", enter the new user password in the window that appears, and then click the "Next" button. The "Personalization Settings" window will appear. Select the project you need (it is OK if you don't select it), and then click the "Next" button again to add a new user to the machine. Use the same method to create a username for each user who can use this machine, and then you can enter your password, of course you can also leave it until the user logs in and modify the password yourself.
Anyone who knows a little about Windows knows that in Windows 9X, this password system has no security at all. It starts when the user logs in by booting or changing the user. After entering the correct password, you can use the system, but even if you don’t know the password, you can use the ESC key to skip the login program and enter the system directly. At this time, we can change the registry to force users to enter their username and password when booting up to enter Windows. Implementation method: Click "Run" in the "Start" menu, enter regedit, open the registry editor, open to HKEY_LOCAL_MACHINE＼Network＼Logon, then create a new DWORD value, name it "Mustbevalidated", change the value to 1, and it's fine.
Unlike Windows 9X, Windows 2000 has made great improvements in this regard. If the system is set to: the user must enter the user name and password to use the machine, then if the correct user name and password are not entered, the system cannot be entered; at the same time, the users are divided into three categories: administrator, user and guest, each with its own different permissions. This provides a means for standardized management of computer users.
In addition, users who are familiar with Windows 9x system know that information about user passwords is stored in files with the extension ".pwl" in the Windows directory. Here we tell you a simple and effective protection method: click "Start" → "Run", enter the sysedit command, and open the "System Configuration Utility". Select About File File. At this time, you will find that there is an item titled [Password Lists] in its list item, which is the link record about the user's password file, where SSJ=C:＼WINDOWS＼(The "SSJ" before the equal sign is the user name, and the user's password file is stored and file name after the equal sign). Knowing this, we can modify it so that we can specify any file. For example, you can rename the source file in advance and copy it to another directory. For example, in DOS mode, execute the command: COPY C:＼WINDOWS＼C:＼WINDOWS＼SYSTEM＼. Then change the storage path of the password file in the middle to SSJ=C:＼WINDOWS＼SYSTEM＼. In this way, no one can easily find your password file anymore.
What happens if you forget your Windows user password? Don't worry, this will not affect the startup of the system, but it will cause the user to be unable to enter his or her personal settings, so it is also necessary to crack the Windows startup password to retrieve the lost "personality". To do this, we can delete the *.PWL password file in the Windows installation directory and all personal information files in the Profiles subdirectory, and then restart Windows, and a password setting box that does not contain any username will pop up. Without entering anything, we can directly click the "OK" button and the Windows password will be deleted. In addition, modifying UserProfiles under the registry HKEY_LOCAL_MACHINE ＼Network ＼Logon branch to "0", and then restarting Windows can achieve the same goal.
4. Power management password
The power management function of Windows can also set a password. After setting this function, the system will require the password to be entered when returning from the energy-saving state. After that, users who do not know the password will not be able to return the computer to the normal state from the "hang" state, which further ensures the security of computer data.
In Windows 98, the steps to set a password for the power management function are:
1. Click
Start the Control Panel of Windows 98.
2. Double-click the "Power Management" icon in the "Control Panel" to open the "Power Management Properties" setting box.
3. Select the Advanced tab from the Power Management Properties setting box.
4. Type "√" before the "When the computer exits standby state, prompt for password entry" option.
5. Select the Power Plans tab in the "Power Management Properties" setting box.
6. In the "System Waiting Status" list box, select the time interval when the computer automatically starts the power management function after no operation (that is, enters the "suspend" state). There are mainly different options such as "from 1 minute later" to "never", which users can choose by themselves.
7. Set appropriate time intervals for "Switch off the monitor" and "Switch off the hard disk".
8. Click the "OK" button to close the "Power Management Properties" setting box.
This way we started the power management function of Windows 98 and set the appropriate password for it. It is worth noting that the password of the power management function of Windows 98 is based on the user password of Windows 98 itself. That is to say, we must first set the user password for Windows 98 before we can use its power management password function, otherwise it will be invalid. In addition, the Windows 98 power management function does not have a separate password, and its password is exactly the same as the Windows 98 user password, which saves the inconvenience of users to remember multiple passwords at the same time. But from another perspective, the password of the power management function is exactly the same as the user password, which will be very unsafe. As long as we crack the Windows user password according to the previous method, the power management password will be broken without any attack.
_info.asp?id=12392" width=1 border=0>5. Screen save password
Next, let’s talk about the screen saver password. Its function is mainly when you leave the computer temporarily and don't want to shut down, and you are afraid that someone will take the opportunity to see what you are doing or move your computer in your computer. At this time, the screen saver password can play a certain role in protecting it, and its reputation is slightly better than the user password than the user password. If the password is incorrect, it is difficult to pass.
Let’s first take a look at how to set the screen saver password. First, in the blank space on the desktop
Right-click the mouse and select the "Properties" command from the shortcut menu, and the "Show Properties" dialog box will open. There are six label items: "Background", "Screen Saver", "Appearance", "Effect", "Web", and "Settings". Clicking the "Screen Saver Tag" will open "Show Properties". In the "Screen Saver" drop-down list box of this window, there are various screen savers that come with Windows. When we select a certain screen saver from it, clicking "Preview" will show the effect of the screen saver. Clicking "Preview" can also display the full screen (clicking the mouse to restore). The Settings button can set the display effect of the screen saver, and you can enter or adjust the time when the screen saver is started in the "Wait" tuner box. What's even more attractive is that the screen saver also has certain confidentiality functions! If you want others to be unable to use the computer when you leave, the easiest way is to enable the password function of the screen saver, check the "Password Protection" box, click the "Change" button to display a "Change Password" dialog box, and then enter the password twice and confirm.
What if you accidentally forget the password of the screen saver? Turn off the computer directly? That's too barbaric; and if your work is not preserved, will all your efforts be wasted! Now, as long as you know the IP address of your machine and use the following method, your problem will be solved!
In fact, the method is very simple. First, you need to use another machine as the decoder in the LAN where your machine is located, change the IP address of the decoder to your IP address, and use the principle of higher priority of hardware conflicts to make the operating system skip the screen saver.
The specific implementation method is as follows:
Find the "Settings" item in the "Start Menu" on this decoder, click "Control Panel", enter "Control Panel", double-click the "Network" icon, and enter the "Network" dialog box.
Select the "Configuration" tab, then double-click "TCP/IP", enter the "TCP/IP Properties" dialog box, select the "IP Address" tab, change the decoder's IP address to your IP address, and click the "OK" button after completion.
The system will prompt you that the new settings need to be restarted to take effect, confirm and restart the computer.
In this way, there are two machines in the LAN with the same IP addresses. When the decoder starts up, a prompt box for "IP address causes hardware conflict" will pop up on both your machine and your decoder. At this time, just click OK on your machine and guess what will happen? That's right, the system does not require you to enter the screen saver password, and you will go directly to the _blank> operating system desktop!
Now you don’t have to worry about forgetting your password, right? However, it is worth noting that during the entire cracking process, you must make sure that there is no dialog box on your machine that requests to enter the screensaver password, otherwise after confirming the hardware conflict, the system will continue to ask you to enter the screensaver password.
The system's screen protection password is very fragile. After we forget our password, we just need to use the "Reset" key to force the computer (some screen savers with imperfect design can even forcefully close them with Ctrl + Alt + Del, which makes the operation easier), then right-click the blank space on the desktop and execute the "Properties" command from the pop-up shortcut menu, open the "Show Properties" setting box and click the "Screen Save" tab, and finally cancel the "Password Protection" option (no need to confirm the password when canceling this option).
Here I will tell you a simpler method. As we all know, the screen protector password is up to 16 characters. Microsoft has built-in 16-byte key: 48 EE 76 1D 67 69 A1 1B 7A 8C 47 F8 54 95 97 5F. Windows uses the above key to encrypt the password you entered. The encryption process is: first convert the password character you entered into bit by bit to its hexadecimal ASCⅡ code value (lowercase letters are converted to uppercase letters first), and then perform the exclusive OR operation with the corresponding key bit by bit, and use each bit of the resulting hexadecimal value as a character to its hexadecimal ASCII code, and add 00 to the end of it as the end flag, and store it in the binary key ScreenSave_Data under the registry HKEY_CURRENT_USER＼Control Panel＼desktop. So just delete the ciphertext of the Windows screensaver password stored in the registry under the HKEY_CURRENT_USERS ＼ControlPanel ＼Desktop ＼ScreenSave_Data primary key!
In addition, a CD specifically used to crack screen protection passwords has appeared on the market. After inserting the disc, it will use the automatic running function of Windows 98 to start the screen protection password cracking program saved on the disc, analyze and decipher the password of the screen protection function, and finally display the password on the screen or write it to the floppy disk, which is more convenient.
There is another worry about screen saver passwords - some friends always like to tinker with computers and often set passwords for screen savers. It would be fine if it was from their homes, but if it was a computer in a school computer room or a street Internet cafe, it would be a bit troublesome. Friends who are worried about this screensaver password, don’t worry. We can block the screensaver password function so that it cannot set the password, so that these troubles can be solved. The specific operation method is as follows: Click the "Start" → "Run" menu, enter Regedit in the "Run" dialog box that opens, and press Enter, and open the Registry Editor, find HKEY_CURRENT_USER＼ControlPanel＼desktop＼ScreenSaveUsePassword (if there is no "ScreenSaveUsePassword", create this Dword value. The method is: right-click "Desktop", select "New" → "DWORD Value" in the pop-up menu, and name it "ScreenSaveUsePassword"). This key determines whether the screen saver uses a password. Its key value is 0 or 1. When it is "0", it means that the password is not set, and if it is "1", it means that the preset password is used. We can disable the screen saver from using password by changing this value to "0".