I think the convenient and easy way is to use a windows password recovery tool that can do all the job for you within a few minutes automatically! Windows Password Recovery 6.0 is an easy-to-use tool designed for resetting local administrator and user passwords on any Windows system. If you have forgotten your password, or are locked out, or you do not have access to the password of the system.
Read more: bypass windows password without losing the data or reloading the operating system
It is asking for your administrator password or bios pass word,it is difficult to know or provide any help for the password issue ,you can take help of your recovery cd.
BEFORE DOING RECOVERY YOU CAN TRY WITH BACK DOOR BIOS PASS WORD,CHECK THE MANUFACTURER OF THE BIOS IF IT IS PHOENIX/AWARD/ BIOSTAR(The backdoor password is a BIOS password that works, no matter what the user sets the BIOS password to. These passwords are typically used for testing and maintenance. Manufacturers typically change the backdoor BIOS passwords from time to time.)
DELL INSPRION 1720 HAS BIOS A09, IT SEEMS IT IS PHOENIX IN THAT CASE YOU CAN TRY THESE PASSWORD BIOS/CMOS/phoenix/PHOENIX
GOOD LUCK
Removing the BIOS battery did not reset the BIOS password because the BIOS password is stored on an EEPROM chip. Please click www.laptopmasterpassword.net
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