When computer turns on I have black screen with blue text box asking for password

If you would like to remove this BIOS password by yourself, you need to see this kind of video:
http://www.youtube.com/watch?v=SxGviSv7EoA

some one must have put in a boot password to your laptop,
follow this:
When booting up, enter your BIOS setup (usually by pressing the F2 key at the appropriate time).

Locate the BIOS Password section and turn the ON STARTUP password to off. There is no standard setup for BIOS, so I can't give you exact instructions.

If this does not work, try:
remove cell & start your pc you will here beep...beep...beep...

then turn off your pc & restore your cell.Start your pc and
password is removed.

there is a battery on motherboard,a button cell,you can try removing that and start computer, then put it back, bios settings will be lost.
you can also try removing any hardware like ram,if you have two,when system is off,turn on , it will prompt for changes , enter bios and try remove password.

The bios password only appers when you press F2 or Del upon powering it ON, so don't press anything when turning it on.

the bios password can be reset and remove its previous password by opening the laptop and remove the CMOS battery inside it, not the physical battery of the laptop, the CMOS battery is a 1inch round battery inside a laptop and computer.

You need to break the password and log into the computer again.
Once reboot the computer with CD/DVD/USB,remove the lost or forgotten password and then log in to your computer withoutany password. Hereis its official website, Hope it helps
http://www.windowspasswordrecovery.net/

Black screen with "Enter Password" in blue box. - BIOS password.
To reset: take the CMOS battery out then place it back again.

Black screen with Enter password in the upper right left corner - could be hard disc password.,
If you set up the password before, you can only bypass that by entering the correct password. If not, it will render the hard disc useless.

that happened to my hp....some kid came to my house and stayed for the weekend...i don't know what the heck he did but i have a blue box as well and the password happens to be "password"....i don't know how i figured it out either...try it...it could work for yours as well!!! I would like to know how to get rid of it

Well, someone if not you- have enabled BIOS password.. So, u better start asking around whoever it maybe.. :) Good luck..

software fault take to a mobile shop to reflash

Enter setup during boot and try to disable the password. Need more info.