The article on this topic should be a lot online, I recently installed win8 to play, if you forget the computer password in win8, how to enter the system, of course, there are a lot of tools, I To say is to manually enter the win8 system. In fact, there is no technical content. The core is to replace the program sethc.exe with sticky keys to cmd.exe. There is a sethc.exe under C:\\windows\\system32 (the one is the program corresponding to the sticky key). Just press shift 5 to achieve it. The steps are as follows: 1. Start the command prompt as administrator, cd C:\\windows\\system32, locate system32 under C drive, sethc.exe and cmd.exe are here. 2, continue to run copy cmd.exe sethc.exe in the command line (put cmd.exe more sethc.exe that run sethc.exe is to run cmd.exe). Of course, you can copy sethc.exe to make a backup. Of course, for security reasons, you can create cmd.exe as a self-extracting and password file, as long as the file name is sethc.exe, of course, this requires winrar support. Why not change directly, but also use the command, it is because dos has higher authority than admin, admin may not succeed so it would be fine. Although dos has higher privileges than admin, it will pop up a prompt to deny access if it is not expected. Why? Directly delete the sethc.exe, rename and other operations will find that in addition to the need for administrator rights, you also need the permissions provided by the TrustedInstaller to make changes to this file. OK, how to get this permission, it is very simple, just change the owner of this exe file. The method is as follows: Right click ——property——security—— advanced, you will find the owner is TrustedInstaller, click on the change on the right, enter your own username or Administrators, and then click on the check name on the right to confirm. Then don't forget to change the user name or access rights of the Administrators, you can change to full control, OK. Then run step 2 to find out that the command was successfully executed. Under XP, it is not so modified, there is no permission to delete the problem, but after the removal of sethc.exe is back, because the system file protection is working, Solution: Run >gpedit.msc> Computer Configuration & mdash; Administrative Templates - System - Windows File Protection changed to disabled. Then open the service and stop the Cryptographic Services service, OK. Don't forget to change it back after the change~ 3, restart the computer, find that you need to enter the password, press 5 shifts continuously, there will be a window of cmd.exe, and it is administrator authority. That's because we changed sethc.exe to cmd.exe and cmd.exe when we run sethc.exe. Enter the command: net user username 123456, and forcibly change the user's password to 123456. Entering 123456 enters the system, and then I am not afraid to forget that the password can not enter the system, and also save the trouble of using tools to crack passwords. PS: In fact, in the interface of entering the password, you can find an icon in the lower left corner, click on the narrator, magnifying glass, screen keyboard, Narrator.exe, Magnify.exe and osk.exe under system32, you can use cmd.exe Replace with these programs, of course, if there is a problem with TrustedInstaller permissions, refer to the above method to solve. Of course, if it is someone else's computer, it is estimated that you can only use tools or winpe to go in, and then change according to the above method, it should be OK~~~