Forgotten your Windows password and you don't have install CD? No problem.
1. Create a boot disk using other PC. You need to download the boot disk files from Download the Offline NT Password & Registry Editor. You can choose from USB install or Bootable CD image. I choose USB install since I have a spare 8G USB Drive and I downloaded the usb140201.zip (~18MB) - Files for USB install (md5sum: a60dbb91016d93ec5f11e64650394afb)
2. Follow the instruction on how to make a bootable USB Drive. If you have other files on the drive just back it up. Though other files will not be removed we just want to make sure.
*Copy all the files that is inside the usbXXXXXX.zip or on the CD onto an root directory not under a folder.
*Install bootloader on the USB drive, by executing in command prompt (start the command line with "run as administrator" if possible)
X:syslinux.exe -ma X:
Replace X: with the drive letter the USB drive shows up as (DO NOT USE C:)
*It should now in theory be bootable.
3. Restart your computer go to BIOS and set it to boot via USB.
4. You will be prompted Step One: Select disk where the Windows Installation is it will display your computer partition. Just hit Enter for Defaults.
5. Step One. Choose the partition where windows is installed. In my case 1 sdb1 and press Enter.
6. Step Two. On the Select Registry Files select 1 - Password reset [sam] and press Enter.
7. Step Three. On password or register edit. Choose 1 - Edit user data and password press Enter. All windows accounts will be listed choose the account you want the password to be cleared.
8. On user Edit Menu select 1 - Clear (blank) user password and press Enter. Then choose q to quit.
9. Step Four. Writing back changes. You will be prompted About to write file(s) back! Do it?
After reboot your account with password is now clear. Proven and on occasion when a friend/family ask help that he forgot his windows password.