housetrained wrote:
> My friend's son has forgotten his password and can't start his Acer
> laptop. Is there a way round this?
>
>
> John the West Ham fan
>
>
On a desktop machine, the password implementation may be to store it in
the CMOS RAM. Removing the main battery, then removing the CMOS coin cell,
may return the BIOS to defaults, included no stored password. On a laptop,
some of the older ones, leave the CR2032 coin cell within easy reach via
an access door on the bottom. The CR2032 is shrink wrapped and on the end
of a twisted pair extension cord.
There are also some laptops build like bank vaults. The CMOS RAM in the
Southbridge, holds normal settings like the boot device. But the password
is not stored in there.
Instead, the password is stored in a 2Kbit serial EEPROM, a separate
device, not subject to battery state. You could unplug all batteries
for ten years, and the password would be safely housed in the EEPROM.
The manufacturer arranges, that the only way to reset the password,
is to send the laptop to them. A gentleman in Eastern Europe, offers
a software solution for $50 to reset it for you, but I have no idea
whether that $50 bet ever wins.
Such "bank vault" laptops may also include TPM (Trusted Platform Module),
encrypted drive, the whole works, and could well be more secure than
any desktop. They're the kind of laptop an executive might lose, and
not fear for data loss if the laptop is stolen or misplaced while on
a business trip. I presume after a little disassembly, a thief could
repurpose the laptop and sell it, but chances are the data on the
drive won't be as easy to get at.
So the answer could well depend on what type of laptop it is. If
its a cheap consumer laptop, removing batteries or "clearing CMOS"
might be all it takes.
(the notion of backdoor passwords, how quaint. A good way to drive
yourself crazy...)
https://answers.google.com/answers/m...dview&id=53385
Paul