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Dell usually sets a default password as password or admin Try those first. If no luck go into the bios setup by continually tapping the exckey while the computer boots. If your licky you may be able to set yourself as administrator and give yourself admin rights. With admin rights you can do anything.
reset the the bios..disconnect all the input mains power
supply..pick open the cmos battery..replace/resit it in again.. this'll hopefully break open bios/cmos password.. to enter in windows..after boot in shell/dos mode n before in windows/gui mode or before the Welcome Screen appears, press Ctrl+Alt+Del..classic logon will open..here in the User Name type: Administrator..press OK or hit Enter..u'll b logged in.. hv professional supervision of ur system admin or vendor....
If this issue started with a motherboard error that appeared to be a faulty CMOS battery and then it started incorrectly detecting your memory and now is asking for a password it could be a faulty motherboard. If you are 110% you or anyone else has set a password on that laptop then I would say your motherboard needs to be replaced. It is a difficult process to reset admin passwords on most laptops due to a security chip that will prevent the trick of removing the battery from working. In all honestly if no one has set a password and the motherboard THINKS someone has then even if you reset the password you will still have issues. There is a small chance your CPU or RAM could be defective. But, again going back to it saying you have a password set that was never set. It just yells faulty motherboard unless someone has set a password without you knowing.
here are 2 password type first 1 is bios password if tell me about your bios password it prompt when u powerup follow procedure below
For that you need to reset factory defaults settings for bios. For reset bios u have to open back side of your laptop then u find motherbord circuit there. pull cmos cell on motherbord for 15 minute then it reset to defaults. Also u can reset with jumper settigns read carefully on mother bord there is 1 jumper near cmos cell u read there " bios reset or clear" It is on 1-2 position right now set it in 2-3 position then power up then all bios settings are reset. then again set it in 1-2 its original position. Then it not want password.
And if u tell about windows password Then when you power up the computer press F8 key then enter in safe mode then wait until it prompt for user passsword
then enter in administrator then if u able to enter then reset your password. But if u set and forgot default administrator password then u should need winxp recovery disk.
You can clear the bios password by removing the CMOS battery from the motherboard, make sure the PC is disconnected from any other power source, wait a good 3 - 5 minutes, hit the power button a few times to make sure all power is drained from the capacitors, and then replace the CMOS battery. You can then power on the PC and the bios password will be removed.
I have set the password for administrator when i entered the bios set up. you can change its setting but not the configuration unless you've entered the password. you can't change the password with a new one if you cant enter the old password. Next time dont forget your password because laptops has its security even when stolen you cant open its bios set up if its protected by password. CMOS battery is in the mother board. You need a service technician to open your laptop to reset the bios setup battery.