1, first you need to have a U disk, and then download a U disk startup tool, to note that this startup tool needs to have the System Password modification tool. General startup tools will have this tool, download as long as the attention can be.
2, and then the U disk Boot tool to the mirror file burned to the U disk, so that the U disk into a can start a U disk, some startup tools themselves have the burning function, and some need you to use specific software into production.
3, made good can start the U disk, below we will enter the PE system. Plug the U disk into the computer, reboot, restart when the DEL Key has been pressed into the BIOS, in the BIOS set to start the U disk.
4, the system restart again, in the boot menu, there will be a change of system password options, with the keyboard up and down the key to select this, and then click Enter, you can also enter the PE system after the modification tool modified.
5, as shown in the picture, this tool can modify the system password, where the arrow refers to select the directory of your system files.
6, after the selection, enter your username below, enter your new password below, two times correct input, click Modify.
7, now, unplug u disk, reboot, then the Win7 system password, is the password you have just set.