Hi guys, a friend asked me to please see his daughter’s notebook. She, not knowing what she was doing, put a startup password a while ago and now she doesn’t remember it. I tried “ALT + R” and it doesn’t work. I took the BIOS memory out and read it with a programmer but I couldn’t find an official complete dump for that model. Does anyone know how to disable the boot password or delete it?
I have the notebook disassembled and I don’t know how to move forward with this …
Note: I guess it has the version X510UA.310 installed, I found this file on the hard drive.
@CPR - BIOS on hard drive does not = BIOS on chip. If you dumped it with programmer, send me a copy and tell me the BIOS chip ID (in case I need to tell you specific version of software or ID to use when you write back)
If the password is stored in BIOS I can remove for you by using stock BIOS, rebuilding complete BIOS, and then transferring back over only your relevant details (serial, UUID, LAN MAC ID etc)
Do not erase or write anything to the chip until I tell you your dumped BIOS is OK. What software and version did you use to make the dump?
I already realized that the downloaded Asus binary is not the same as the dump, first I compared the binaries. The flash memory is 25B64CSIG. To read the memory, I used a generic programmer (chipmax2/Max loader) configuring a chip with similar electrical characteristics (like the W25Q64FVSS).
Here the dump: https://we.tl/t-WI0RJ1ww3r
thank you very much for the help 
@CPR - Dump would never match Asus BIOS anyway, but that is not what I meant, I mean Asus BIOS (Download, or on disk) is not a complete BIOS (missing regions, partial BIOS)
That is GigaDevice chip, most closely related to GD25Q64 and this is the ID you should use. I’m not sure if you can only use your programmers software, or others? If you can use other general CH341A software, please 1.30 and GD25Q64 ID from this package below, then make new dump and send me.
This way we can compare both, and I already know for sure this software/version has been confirmed to read and write to this chip properly with the ID I mentioned. I checked your dump, looks OK, but best we compare with known working software version and chip ID, if possible.
Also, from your same software you did this dump, make a new one with GD25Q64 ID as well, so then we’ll have 2 or 3 to compare, this way we know what will write to chip without issue (in case you can’t use general CH341A 1.30 software I linked below)
http://s000.tinyupload.com/index.php?fil…213094641136166
The password can be decoded from this dump.
Hi guys, I already solved the problem. I downloaded the dump that cobrachaos uploaded in the thread "[HELP] ASUS s510ua-db71 WINBOND W25Q64JVSIQ BIOS read and write". Although it is not the exact same version of notebook it worked well for me. The notebook started normally and everything works ok. I wrote the flash using my universal programmer with the W25Q64BV chip configuration, similar to the original GigaDevice 25B64BSIG.
Thank you very much everyone for the help.
:-))
@CPR - Now you have cobrachaos serial, UUID etc, until you transfer in your correct details 
At least you now know password is stored in BIOS, and you CAN program in stock BIOS and use that instead if you want (may need stock BIOS built into complete BIOS first, I am not sure and am not looking at the BIOS for this system right now)
Jajaja, Yes, I know, but how can that affect? What is the serial number and other parameters used for? I just had to reset the windows PIN, everything else worked fine. Searching for the bit that disable the startup password was going to take much longer…
@CPR - It may affect various program activations, for you or him, and windows activation may be affected for one or both of you guys at some point in the future too.
Now that you know other BIOS removed the password, as I mentioned initially, just program in stock BIOS then (must be rebuilt into complete BIOS), or ask someone (me) to transfer your details into a proper clean BIOS 
Thanks for the info.
I already gave the PC to my friend. If he has problems with that in the future, I will contact you to solve it in the correct way.
Thank you!
@CPR - OK, hopefully all will be OK for him, and the user who’s info (cobrachaos) you put into your friends BIOS 