Reset Forgotten windows password

Hiren's BootCD From USB Flash Drive (USB Pen Drive) :

Step 1

Connect USB Pen Drive (1GB or more)
Step 2
Download and Run USB Disk Storage Format USBFormat.zip (34KB)

 Step 3
Download grubinst_gui grub4dos.zip (179KB) and Run as Administrator

Step 4
Insert the BootCD (10.3 or newer) in the CD Drive and Copy everything from CD to USB Flash Drive

Step 5
Copy grldr and menu.lst from grub4dos.zip (or from HBCD folder) to the usb drive

Make sure you set your computer to boot from USB Flash Drive

To Enter the BIOS press the "Del" button on your keyboard. Alternatives are "F1", "F2", "Insert", and "F10". Some PC's BIOS might even require a different key to be pressed. Commonly a PC will show a message like "Press [Del] to enter Setup" to indicate that you need to press the "Del" key. Some AMI BIOS require you to enable the option "USB Keyboard Legacy support"!