Pressing f12 it shows me a password request for bios.what can i do?

can you click on f12 before it goes to boot password?
The F12 Boot Menu allows you to choose which device that you would like to boot the computer's Operating System from by pressing the F12 key during the computer's Power On Self Test, or POST process. Some notebook and netbook models have the F12 Boot Menu disabled by default.
If this sounds like your problem then try this:
If this sounds like
To enable the F12 Boot Menu:

1. Restart the computer.
2. Press the F2 key to enter computer's BIOS Setup during Power-On Self-Test, or POST, process while the Acer logo is being displayed.
3. Press the Right Arrow key to select Main
4. Select F12 Boot Menu
5. Press the Enter key
6. Select Enabled
7. Press the Enter key
8. Press the F10 key and then press the Enter key to save the changes and restart the computer.

Note: Not all Acer notebooks or netbooks have the F12 Boot Menu feature. Computers that do not have the F12 Boot Menu feature will not be able to enable the feature within the BIOS. I hope this works for you if not, then the problem is obviously not the boot menu. Go to Acer support for more help

first unplug all power from your computer. Next open the side panel of the desktop. Inside the computer you will see the motherboard. locate the battery ( round flat like a quarter size, silver color). Carefully ( very carefully) remove it. Wait 10 seconds and reinstalled it. This will reset all your cmos or bios setting to factory setting including deleting your password.

At boot time repeatedly pressing either, F2 , F12, or possibly Fn+F1 this is depending upon the bios wether it has been updated or upgraded. One of these should do the trick.....

when you start your pc enter the bios setting pressing F2 normally.. once there you can find the security option and bios password is in there type the password you would like and press F12 nomally to exit the bios with saving

restart your computer and when it comes back on press for bios it may be the F2 button or Del button ect..... once in bios select security and bios password options will be in there choose your password and exit&save by pressing F12 normally

When you first start the computer, rapidly press F12. When bios shows up navigate to password and delete it. The button might also be F10. Most laptops are F12 but some vary. Hope this helps.

try to reset the bios to factory defaults to do that keep tapping the f2 key as soon a you turn on the computer until you see the bios screen then using keyboard go to a tab which says boot then press f9 key press 'y' to confirm then your computer should boot properly everytime..
take a look at this picture just to show you how that screen looks if this doesn't work try doing system restore..to do system restore try this link..see the use system restore topic

Restart the computer, and read the first message (white text on a black background), hoping that it says something like "press F1 to enter BIOS setup, press F12 to select boot priority".

If it does, press F12, and then select the CD-ROM device as the "bootable" device.

Try On bootup you should either Press 'DEL' or 'F1' or 'F2' to enter the BIOS

Hello pink,

In order for your PC to read your CD on boot, you don't have to enter your BIOS settings. When you start your computer, press the F12 button repeatedly (like F12-F12-F12-F12), and your pc will ask you which boot device you would like to use.
http://ice.he.net/~hedden//images/F2_for_Setup_Dell.jpg

It will show you a screen like this:
http://www.prime-expert.com/ebcd/img/bios8.png

Just select your CDROM in the list, and hit enter. this will read your bootable CD.

I hope this helps.
Jerry.