For laptops, had better not easily set password, for laptops
COMPAQ Presario 2158 Series Battery this password is not like a PC that stored in CMOS circuit can discharge cleared the, at present relatively new laptop is preserved in the mainboard passwords several pieces in logic circuits, our personal is unable to decode (this series computer, the password can add to three floors and according to different equipment encryption, if password missing words, hehe... computer but is a word), crack, may take had to change a lot of money.
But for models older laptop, you can try the following method, perhaps can remove notebook this password: one is to change the hardware configurations, such as machine drive off again likely will automatically enter Setup program, and remove this password. The other was to try to find a chips on the mainboard, the chip called 818 chip, general is "MC146818" 24 pins, short sub article 12 feet and 24 feet 1 seconds, or find a marked "MC14069" chip, brought the first 14 feet of short answer it, perhaps can achieve the purpose of clearing the password.
For Toshiba laptop
compaq presario v5204nr battery if you forget your password, you can use the password service floppy disks to solve (password service floppy disk in every time you set or modify boot password, please keep generated. Specific steps as follows: insert password service in drive floppy diskette. Press Enter, appear the following message: Set Pass Again? (Y/N) press "Y" run SETUP program, set new password. Press N restart your computer.
Note: Password service floppy disks must be inserted in the drive, or display will return to the Password. If they are already in a floppy disk in the drive inserted and the message still remains, password services may have problems floppy disk. In addition, the use of password service diskette should pay attention to the following two questions: if BIOS guide priority set to hard disk or cd-rom, press the reset button, maintain the F key press from floppy drive to ensure guidance. If a computer is in recovery mode, open the power supply password service floppy disk will doesn't work. At this time, also please first press the reset button.
For models older Toshiba notebook computer, the BIOS password protection exists a "back door". You can try to introduce below, we might be able to bypass Toshiba notebook BIOS password restrictions, without input any password authentication. Ready for a formatted good empty floppy disks, another computer, a binary editing software (such as Norton DiskEdit or UtralEdit 32, etc.). Specific steps as follows:
Start another computer
COMPAQ Evo N1020V-470050-056 Battery, open the binary editor, will insert a floppy disk drive, modify the floppy disk first sector of the top five bytes, make it become: 4B 45 59 00 00, pay attention to boot sector is the first 0 sectors, don't make it right. Then save modification, you now have a key dish. Will this disk of inserting notebook computer floppy, press reset button, when you are prompted to restart direct input password, the system and press enter to alert you whether to set password again. Click "Y", enter. Then you'll see the BIOS setup interface, can reset the a new password.
If the above method don't help, can only send laptop computer professional approach, with special points after the warranty, if you only on price was a jolting. So generally no particular reason, a laptop or not optional Settings boot password. To ensure that data security, suggest you pack WIN2000 / NT or WINXP operating system, and using NTFS format partitions, so actually better than simply set password, more can guarantee on systems installed. Now some laptop also provides fingerprint identification system installation measures on, instead of traditional BIOS password protection.
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