Password protecting the Bios is considered a weak protection, something that professionals can find out or reset in no time. Besides the obvious possibilities to set a jumper or remove the bios battery to reset the bios password it is also possible to reveal or reset the bios password by using a software like CmosPwd which is available for Windows, DOS and Linux.
Most users will probably run the application in Windows. To do that they need to access the command line and install a driver that gives “direct port I/O access for specified ports to user-mode process (ring 3) using Ke386SetIoAccessMap and Ke386IoSetAccessProcess kernel functions.” The driver is located in the Windows directory of the software package after unzipping it to the computer.
The command ioperm.exe -i is used to install the driver which can be uninstalled with ioperm.exe -u after the bios password has been revealed. Once the driver is installed the bios password can be revealed with the command Cmospwd_win.exe which displays a list similar to the one below.
The application requests the password for all known bioses. Only one hit will be found obviously which in the case of my bios was test in the Award 6.0 line. Reseting the bios can be initiated in DOS with the command cmospwd /k. Please note that the cmospwd.exe file is located in the DOS directory of the application. It can also be reset with the cmospwd_win /k in Windows.
Most notebooks store the bios password in an eeprom which can only be retrieved with an eeprom reader.
Related posts:
Find out your bios passwordHow to bypass your bios password
Reset Windows Passwords if you cannot login anymore
Reveal Passwords behind asterisks in Internet Explorer
Find out the which BIOS is installed in your PC
7 Responses to “Reveal or Reset the Bios Passwords”
Trackbacks/Pingbacks
-
[...] | gHacks « Evidence Collector Leave a [...]
-
[...] XKOD te presentamos a CmosPwd, una herramienta gratuita, con la que podremos descifrar la contraseña almacenada en la CMOS, totalmente funcional [...]
Great article. This can truely be a livesaver. Stumbled.
Didn’t work on my Dell laptop .. the password wasn’t revealed
zzzZZZzzz: Maybe the last line explains your problem?
“Most notebooks store the bios password in an eeprom which can only be retrieved with an eeprom reader.”
Didn’t work on my Dell Machine.. this sucks
As I said it does not work on notebooks normally. If you tried everything and it did not reveal the bios password you have to reset it on dekstop PCs. Try the killswitch first, if that is not working your only chance is to remove the battery or set the jumper.