1. Brush BIOS can fix the original BIOS's inherent errors and defects, such as memory compatibility, increase support for new CPUs, add new options, just like software updates, fix bugs, add functionality.
2. The so-called flash BIOS is to update the original file, which is just the same as the software upgrade is only under DOS (and some can support WINDOWS).
3.Vista OEM wants to add a SLIC in the BIOS to break through the verification. Someone on the Internet provides the modification, provide your BIOS file and then crack and rewrite it. It is dangerous to use the virtual BIOS method of the OEM machine's motherboard generally does not provide BIOS updates.
We know that there are two kinds of BIOS passwords, user password and system password. The former is used when setting the BIOS, while the latter is required to input before the self-test. Let's talk about the removal of the user password. Because of the removal of the system password, only two methods are known so far. . First, of course, it is discharged. Second, it is to find the default password of the manufacturer. . . . (I will mention it below).
In general, the computer's CMOS settings can be accessed and changed through the 70H and 71H ports. The easiest way is to clear them all, which becomes the default setting. The following program is to use the Debug command to clear the CMOS data. Debug is an external command of DOS. You can find it in the Windows\Command directory, start the computer to the MS-DOS environment, and enter Debug under the DOS prompt. Enter, the # process is as follows:
c:\dos》debug
-o 70 21
-o 71 20
-q
or:
c:\dos》debug
-o 70 10
-o 70 01
-q
Note: "-" is the system itself, so no input is required.
Then restart, you will find that the user password is cleared.
2, the most straightforward way - the discharge method (the most BC is also the most practical method)
This method requires opening the case, finding the CMOS battery, and discharging it. In fact, most of the motherboards today are equipped with jumpers or DIP switches that discharge CMOS batteries. Generally, the jumper or switch is found. It takes a few seconds to switch or a few seconds to switch. If your motherboard is an old motherboard, there is no CMOS battery discharge jumper or DIP switch, or you can't find the motherboard manual at all, don't know which group is the jumper for CMOS battery discharge, then you simply unplug the CMOS battery and connect The bare pin is about 1 minute (in fact, it can be a few seconds, but some articles say that it takes 1 hour, that is, let CMOS have no power supply for a long time, let it automatically clear the content).
3, relying on software to achieve (this is online to find)
With the help of software (such as PCTOOLS and NORTON) it is easy to clear the CMOS password. Here are two simple examples:
1. BOOTSAFE (BOOTSAFE.EXE can be found in PCTOOLS 9.0)
Run BOOTSAFE C:/M, back up the CMOS information and boot area information to a blank floppy disk, form two text files of CMOS.CPS and CBOOT.CPS, and then modify some contents of CMOS.CPS with EDIT and other editors. After saving, use the disk to start, run BOOTSAFE C: / R, the system will ask whether to restore CMOS data from the floppy disk (answer YES) and whether to restore the partition table data from the floppy disk (answer NO), and finally restart, then all content in CMOS Has been cleared.
2.RESCUE (RESCUE can be found in NORTON 8.0)
Make a rescue disk with NORTON's RESCUE function. Also use an editor such as EDIT to arbitrarily modify the contents of the CMOS.DAT file in the emergency disk. After saving, use the emergency disk to start. Then run RESCUE.EXE in the emergency disk, select the recovery CMOS information (CMOS InfomaTIon) in ITEM TO RESTORE, and restart after completion.
3.BiosPwds (can be downloaded at major software stations)
BioPwds makes it easy to know the BIOS password. It is also quite simple to use. After running this tool, there will be the interface of BiosPwds tool. Just press "Get Passwords" on the interface, and wait for two or three seconds to display the BIOS information on the BiosPwds interface, including : BIOS version, BIOS date, password, etc., then you can easily know the BIOS password.
Of course, you can enter the system, use some other tools (there are many, many), look at the password, not to mention this here.
4, cracker method - in fact should be placed in the above software method (more unrealistic )
Color 10,5
DIM A(9)
CLS
PRINT SPACE$(980);TAB(22);"THE PASSWORD FOR ZHE BIOS IS:";
OUT&H70, 28
P=INP(&H71)
OUT&H70, 29
Q=INP(&H71)
X=16^2*Q+P
Color 30,5
I=0: J=0: N=0
Y=X+I*65535
Z=INT(3*Y/(4^(N+1)-1))
IF Z
Then press "F6", then press Enter to save, run the cmos.com file, and then reboot.
5, change the hardware configurationWhen the microcomputer starts up, the cured BIOS program first checks whether the hardware configuration of the machine is consistent with the parameters set in the CMOS. When there is a conflict or inconsistency, the Setup setup program will automatically enter after booting up without entering a password. Using this principle, we can open the chassis and change a hardware configuration to achieve the effect of automatically clearing the password. Proceed as follows:
(1) Open the chassis and change the original configuration of the machine, such as unplugging the sound card or disconnecting the floppy drive data cable.
(2) Restart the computer, after the machine automatically enters the Setup program, you can reset the CMOS password.
(3) After resetting the CMOS password, press F10 to save the settings and restart the machine for the settings to take effect.
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