How can you tell if your bios password was hacked? I've read that there is software that can hack bios passwords or the battery can be removed from the motherboard. What would be some signs of a hacked bios password? Also what can I do to prevent this? Would disabling everything but the hard drive during boot sequence help to prevent software hacks? Is there anything I can do to prevent the battery trick?

Need help.

Weld your chassis

Science is built up with facts, as a house is with stones. But a collection of facts is not more a science than a heap of stones is a home

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I don't know what you mean by weld your chasis? Could you explain some more?

What about locking my case? What would be a good way to do this?

not absolute,
if bios password was bypassed,
settings might be changed,,
using security software might help,
and locking computer would stop hardware from being tampered with,
what's best is to use what's need in the working enviroment only,...
are you blocking kids, co-workers, networking?
many variables make a difference,
:)

In 99% of systems, the BIOS is on the motherboard, not on the HDD. Password protecting it prevents anyone from tampering with the settings, but the password can be easily removed & the BIOS reset to the defaults by using the ClearCMOS jumper or by removing the CMOS battery. Even if you lock the case (aka "weld the chassis"), software programs such as KILLCMOS exist that will also remove the password. I don't know that there is a secure way to protect your BIOS, other than to prevent anyone else from accessing your machine.

The whole point, is, that a bios password does virtually nothing, in the first place. If someone can "hack" your computer, say from the internet, having or not having a bios password will do nothing at all.

Now, say, a Thinkpad, with a hard drive and or supervisor password, THAT is a different matter.

If the BIOS password was compromised by the method you mention...removing the battery, then you would know it. As when you attempt to enter the BIOS, the password will have been disabled.

If you want to prevent physical access to your BIOS, do as jboy suggests. Weld the case shut. Not my recommendation, as if you eventually need to open it...Well...that's obvious.