If you lost Windows 7 password and don't have another administrator account or a password reset disk, you won't be able to get into your computer and reset the lost password. If there are no other user accounts on the computer, you can never use your computer again untill you reinstall the system.
Therefore, the best way to keep your computer from dying and keep all data stored on it intact, is to make a password reset disk by yourself to reset your Windows 7 lost password. How? Just follow the 3-step guide below.
To create a password reset disk, the first thing you need to do is to choose a program that can be burned into a bootable disk. Wondershare LiveBoot bootable CD/USB is such a kind of program, which permits you to enter the computer and reset the lost administrator password in Windows 7. You can use it in Windows 7, XP or Vista, and burn it into a CD/DVD or an external usb drive.
After running the software on your computer, the software window will be displayed as follow.
All you need to do here is to click the burn button after inserting a blank CD/DVD or USB drive into the computer. Then take out the disk or usb drive when the process finishes. It's an extremely work. One thing you need to pay attention is that choosing to burn with a usb drive if there isn't a burner installed on your computer, because burning with a usb drive doesn't ask for an extra burner.
Here you can enter the locked computer now. Insert the bootable disk or usb drive you've just created into the computer. Start it and press F12 button immediately to enter Boot Device Menu. You can choose the USB CD-ROM Drive and click Enter. Then you get the boot menu as follow. Select "Boot from LiveBoot" and then you'll get into the locked system.
When the system files are loaded completely, you are in the system now, and the LiveBoot runs automatically. Here you need to choose the "Password & Key Finder" on the program's interface and hit on the "Admin Password Resetter" to reset the lost administrator password for Windows 7 as blank.
Then restart the PC and get into the system as normal, you'll find that the system doesn't ask for a password anymore, and you can enter to use the computer as before.
If you are going set a new password on your Windows 7 computer so as to prevent unauthorized accessing, please make sure that the password you set is easy to remember so that you will not lose it again.