Ways to bypass BIOS passwords
Despite the fact that the BIOS is a powerful means of protection, there are ways to bypass the password set in it.
Sometimes, curious or aspiring users to protect their data as much as possible put passwords on everything that is possible, but often they forget these passwords. Forgotten password is transferred to the BIOS ( password to boot the system ), this can often lead to the purchase of a new motherboard, but this can be avoided by taking advantage of the weaknesses of the computer building architecture and the deliberately left black moves.
I believe that all (or almost all) inhabitants of Habrahabr know that the BIOS password (as well as other basic system settings) is stored in the CMOS memory (Complimentary Matal-Oxide-Semiconductor - Complimentary Metal-Oxide Semiconductor), which requires constant recharge battery installed on the motherboard.
Hence one of the ways to bypass the password, or rather to reset it, along with all the settings stored in the BIOS :
')
Since CMOS requires constant recharge to save data, it follows from this that by removing this recharge (battery) for a while (about 24 hours) we will get the BIOS clean. After you need to re-insert the battery in the right place and when starting the computer, specify again set the desired parameters like time, new password (if you really need it so much) and other settings you need.
The method is effective, but long, and time, as you know, is a very valuable resource and the user, like the IT specialist, does not always possess it. These features make this method not very practical and more extreme means than real practice. In addition, the battery on some models of motherboards can be extremely difficult to remove without using additional tools, so it makes sense to resort to the method described in the instructions for motherboards:
On most motherboards, there are special connectors for clearing the CMOS memory, which are usually located in close proximity to the battery ( you can find out the location of such a connector from the motherboard diagram given in its instructions or on the manufacturer’s website ). To clear the CMOS memory, you need to close these connectors, then turn on the PC and re-set the BIOS settings.
If you are lucky, to whom rare situations often occur, or you are simply not looking for easy ways, then there is another way for you ( described in the book goldenshara.com/viewtopic.php?t=7802 ):
It consists in entering the engineering password for the given motherboard instead of the forgotten password:
However, it is worth remembering that these passwords only work on BIOS versions 4.55G and lower (the class of motherboards up to i845P chipsets ).
Another method to reset a password is to use the DOS environment. To do this, you need to boot into the DOS environment (pure DOS , not emulated from under Windows ) and enter the following commands:
* AWARD and AMI BIOS :
DEBUG
-O 70 17
-O 71 17
Q
* Phoenix BIOS :
DEBUG
-O 70 FF
-O 71 FF
Q
In addition to this method, there are programs for determining or resetting the BIOS password from the OS environment. For example: amikrack.exe and awardcrack.exe and others, but to use them, you must have access to the OS, which is problematic if there is a password for further loading after testing the hardware of the PC.
Sometimes, curious or aspiring users to protect their data as much as possible put passwords on everything that is possible, but often they forget these passwords. Forgotten password is transferred to the BIOS ( password to boot the system ), this can often lead to the purchase of a new motherboard, but this can be avoided by taking advantage of the weaknesses of the computer building architecture and the deliberately left black moves.
I believe that all (or almost all) inhabitants of Habrahabr know that the BIOS password (as well as other basic system settings) is stored in the CMOS memory (Complimentary Matal-Oxide-Semiconductor - Complimentary Metal-Oxide Semiconductor), which requires constant recharge battery installed on the motherboard.
Hence one of the ways to bypass the password, or rather to reset it, along with all the settings stored in the BIOS :
')
Method 1 - Chubais Method
Since CMOS requires constant recharge to save data, it follows from this that by removing this recharge (battery) for a while (about 24 hours) we will get the BIOS clean. After you need to re-insert the battery in the right place and when starting the computer, specify again set the desired parameters like time, new password (if you really need it so much) and other settings you need.
The method is effective, but long, and time, as you know, is a very valuable resource and the user, like the IT specialist, does not always possess it. These features make this method not very practical and more extreme means than real practice. In addition, the battery on some models of motherboards can be extremely difficult to remove without using additional tools, so it makes sense to resort to the method described in the instructions for motherboards:
Method 2 - Emergency Button
On most motherboards, there are special connectors for clearing the CMOS memory, which are usually located in close proximity to the battery ( you can find out the location of such a connector from the motherboard diagram given in its instructions or on the manufacturer’s website ). To clear the CMOS memory, you need to close these connectors, then turn on the PC and re-set the BIOS settings.
If you are lucky, to whom rare situations often occur, or you are simply not looking for easy ways, then there is another way for you ( described in the book goldenshara.com/viewtopic.php?t=7802 ):
Method 3 - Engineering Password
It consists in entering the engineering password for the given motherboard instead of the forgotten password:
| Award | |
|---|---|
| _award | Condo |
| 01322222 | d8on |
| 589589 | Hlt |
| 589721 | J262 |
| 595595 | J332 |
| ALFAROME | J64 |
| Ally | Lkwpeter |
| ALLY | LKWPETER |
| aLLy | Pint |
| aPAf | Pint |
| AWARD PW | SER |
| AWARD SW | SKY_FOX |
| AWARD_SW | SYXZ |
| Awkward BIOSTAR | TTPTHA |
| CONCAT | ZJAAADC |
| AMI | |
|---|---|
| AMI | Condo |
| AAAMMMIII | HEWINTT RAND |
| AMI | LKWPETER |
| AMI? SW | PASSWORD |
| AMI_SW | SER |
| Bios | |
However, it is worth remembering that these passwords only work on BIOS versions 4.55G and lower (the class of motherboards up to i845P chipsets ).
Method 4 - Recall the old
Another method to reset a password is to use the DOS environment. To do this, you need to boot into the DOS environment (pure DOS , not emulated from under Windows ) and enter the following commands:
* AWARD and AMI BIOS :
DEBUG
-O 70 17
-O 71 17
Q
* Phoenix BIOS :
DEBUG
-O 70 FF
-O 71 FF
Q
In addition to this method, there are programs for determining or resetting the BIOS password from the OS environment. For example: amikrack.exe and awardcrack.exe and others, but to use them, you must have access to the OS, which is problematic if there is a password for further loading after testing the hardware of the PC.
Source: https://habr.com/ru/post/128466/
All Articles