BIOS Password for Compaq EVO D510

February 13, 2009 at 18:29:49
Specs: Windows XP
Please friend can you help me.
I have second hand computer. Administration
password is locked in os and bios. I tried to
guess bios password so many times. I pulled
battery and jumber. But it did not work. Do
we have any other ways???

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February 13, 2009 at 18:51:38
You have to unplug the power cord for the BIOS password to clear. If you simply turn the system off & move the jumper (or remove the battery), chances are good the BIOS won't reset. But if you can't get it to reset even without the power, try KillCMOS:

Resetting the Admin password is easy...just use the following:

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February 13, 2009 at 18:57:34
friend thanks for reply. I unpluged the
switch too. Now I cannot log in into system,
because i have formatted hard drive using
another board.

Now again one more problem. I plug hard drive
on original board. it doesnot boot from hard


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February 13, 2009 at 19:06:02
If you formatted it, what do you expect to boot to?? The hard drive is now blank! Or am I misunderstanding what you mean?

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February 13, 2009 at 19:10:43
Sorry for my unclear questions
I formatted it and reloaded from another
system. But it does not work on original
system. I formatted it because i did not have
windows password neither big

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February 13, 2009 at 19:17:21
You can't install XP on one system, then swap the HDD into doesn't work that way. You have to install it on the system you're going to run it in. Either wipe the drive & start over or try doing a repair install:

You're probably going to need all the drivers too:

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