Individual brands have quirks specific to that manufacturer. Check your brand below - there may be secret sauce that enables your BIOS to crack.
In the case of Asus laptops it's the date code you require - enter an incorrect password then press Alt +R at the next prompt. Take that date & enter it in the BIOS Master Password Generator below in the same order (yyyy-dd-mm, mm-dd-yyyy or dd-mm-yyyy) as displayed on your Asus laptop.
NB: Use the hyphen key "-" as the date separator, not "/". Like this: dd-mm-yyyy, not dd/mm/yyyy.
Press & hold the left Ctrl key when entering the password in Dell laptops, then hit Enter twice.
Some Dell service tags are missing a suffix – first try the password generated, then try the passwords for all suffices by adding either -595B, -2A7B, -D35B, -1F66, -6FF1 or -BF97 to your service tag.
Downgrading the BIOS can change your suffix, resulting in a successful password generation. If your BIOS is set to allow downgrades, this method will help.
-8FC8& -E7A8 suffixes are based on an entirely new method of creating the BIOS Master Password. The solution is available by clicking the matching PayPal donation button & posting your challenge code along with PayPal transaction ID in the Comments.
NB: Dell often require a USB QWERTY keyboard for password entry, & to use CAPS LOCK not SHIFT when entering Uppercase characters.
Many earlier Elitebook & Probook models are vulnerable to the Mazzif tool available from our downloads page. Full instructions included, be sure to read fully beforehand.
i & I plus 8 digits master passwords are correctly generated,
If your Lenovo laptop has an Insyde H20 BIOS, then your secret sauce is to use a USB qwerty keyboard when entering the master password generated here. Forget your built-in laptop keyboard, use a USB qwerty keyboard.
Sony & Vaio brand 4 x 4 Challenge Codes are a one-time password, generated fresh each boot.
Do not turn the laptop off after obtaining the Challenge Code as the BIOS Master Password is specific to that code. Restarting before the password is entered will require a new Master Password.
Anyway, whichever BIOS-locked laptop you have, grab the Machine ID Code - sometimes called the Service Tag, Challenge Code or Response Code - usually displayed after submitting a few (3-5) incorrect codes - that’s the unique identifier we need.
Pay special attention when reading the code, be careful not to confuse lower L with upper i (l or I), zero & upper o (O or 0) - if your input is not exact, the response will not be correct & your laptop will not open.
Now enter that carefully-copied challenge code into the box below then hit the Crack It button.... Ka-ching!!
No surveys to fill out, no pop-under pR0n adverts, just pure goodness & quite likely your Laptop BIOS Master Password too.
When you've done your Laptop BIOS Master Password Reset, please leave a comment, send a tweet, or do whatever peeps do on Facebook to tell the wwworld about your win....