The computer password forgot to do?

As the knowledge of network security is pervasive, many people for the security of computer data or to protect their privacy reasons for their computer set the power-on password, but sometimes a long time, the computer password forgot how to do, perhaps in our urgent need to use the computer, but very distressed why they can not remember their own set the password, At this time must calm down, think of their usual set the number of passwords, a series of things, or think of what the password prompts, as soon as possible to remember the password, do not line, the following methods.

Methods and steps:

Method One

Computer boot password forgot how to do? If we turn on the user name of the administrator on the screen, then we hold down the CTRL + ALT key in the interface state and press the "Delete" button two times in a row. Key at this point will appear a Windows Classic login interface, username is the administrator, the password is empty.

Method Two

1. If your computer is already logged on to the system, but forgets the password, this is the easiest situation.

Turn on Computer Management as shown

2. Then, right click on the user name, point to modify the password can be, do not need to enter a long password can be modified

3. If the system can not log in, but the installation of DOS or a key recovery, or maxdos, and so on, you can directly restore the system, the boot, 5 seconds, hold down the key to appear and then enter, directly a key recovery, you can

4. Use the CD-ROM with the Windows password cracking tool, in the BIOS settings for CD-ROM boot, where the start of the boot device to Dvdcdrom can be, and then restart OK to enter the CD, point crack password can!

Method Three:

1. Restart the computer, press the F8 key after the boot until the Advanced option screen appears, then release the hand, select the "Command Prompt Safe Mode" carriage return.

2, at the end of the operation, the system lists the system Superuser "Administrator" and the local user "* * *" selection menu, mouse click "Administrator", into the command line mode.

3, type the command: "NET user * * * * * 123456/add", forcing the "* * *" user's password changed to "123456". If you want to add a new user here (for example, the username is abcdef and the password is 123456), type "NET user abcdef 123456/add", which can be added "net localgroup Administrators Abcdef/add" command to promote users to the System Management Group "Administrators" and to have super privileges.

4, restart the computer, select Normal mode to run, you can use the changed password "123456" Login "* * * * * users."

Method Four

Install the CD with Windows XP system to repair the system's method and crack the Super machine administrator password

Step 1th: Set the system to CD-ROM and put it in the system installation CD. When the first selection interface appears, press ENTER, and then press the "R" key to begin repairing the installation after the second selection interface appears. The installer then checks the disk and starts copying the files. When the file is copied, the system restarts automatically.

2nd step: After the reboot, the system will enter the graphical installation interface. Note: You should pay close attention to the lower left corner of the interface, and immediately press the key combination "SHIFT+F10" when the "Installing Device" progress bar appears. Then something unexpected happens, and a command prompt window appears in front of us. This is the key to cracking the code.

Step 3rd: Type "lusrmgr.msc" in the Command Prompt window and enter (excluding double quotes) to open the Local Users and groups administration tool. Click "User" on the left and then right click on the administrator account on the right to select "Set Password". At this point, a warning window pops up. Some of the information in the system will become inaccessible after the password has been modified. This refers primarily to files that have been encrypted with EFS and have not been exported before, and the files will not be accessible after the password is modified. If there is no such document, I will not ignore it, click "Continue", then enter the new password, and click OK. Then close the Local Users and groups and command prompt windows, and continue to complete the repair installation. Once the installation is complete, the system administrator account is reactivated.

Method Five

winxp/2000 under the countermeasures: Delete the system installation directory system32 config Sam file, reboot, at this time Administrator Admin Administrator account has no password, with Administrator account login system, do not enter any password, Enter the system and then reset the login account password.

If it's a CMOS password, forget:

The motherboard battery is deducted, wait 10 minutes in reverse loading can.

Cancel the CMOS password without discharging:

1, run input cmd return to open a command prompt, enter debug return.

2, enter "O 70 10" carriage return (note: is the input English O, is not the number 0,o and 70 has the space between 70 and 10 has the space).

3, enter "O 71 10" carriage return (note: is the input English O, is not the number 0,o and 71 has the space between 71 and 10 has the space).

4, input "Q" return.

5, restart the computer, the CMOS password has been cleared (the above double quotes do not enter).

Method VI (for users of the Win2000 system only)

You can install an XP system on another partition, the hard disk partition format should be the same as the original, and please note that you must not be installed with the original XP in the same partition! Before you start, be sure to back up the boot area MBR, there are many ways to back up the MBR, using tool software, such as anti-virus software kv3000. After the installation with the administrator landing, now you have the original XP has the absolute right to write, you can put the original Sam test down, with 10phtcrack to get the original password. You can also overwrite all the files under the newly installed XP winntsystem32config to the C:winntsystem32config directory (set up the original XP installation here), and then use kv3000 to restore the previous grief of the main boot zone MBR, Now you can log in to XP as an administrator.

Delete the Sam file in the C:winntsystem32config directory and reboot. This is the Admin administrator account has no password.

This method cannot log on to Windows after 2000 is valid for XP invalid deletion.

Method VII (for users of the Win7 system only)

1 Find a PE disk to start the computer

2 after entering PE to C:WINDOWSSYSTEM32

(1) Change the owner of Magnify.exe and Cmd.exe as: Administrators

(2) Change Magnify.exe and Cmd.exe permissions administrators to Full Control

(3) renamed Magnify.exe for Magnify.exe1 renamed Cmd.exe for Magnify.exe

3 Change Password

(1) Reboot to Windows 7

(2) Enable Magnifier

(3) The rest is very simple, enter the command "NET user" to view the user name, and then enter the command "NET user username new password" can be. (Activate administrator account to use NET user Administrator/active:yes) finally shut down the command Prompt window, in the Login password box to enter the new password just set, see, is not successful into the system! Finally, don't forget to change the files that you moved and renamed before. It's a serious back door!

4 Forget the password, unable to log on to the system. This situation to deal with more trouble, I tried safe mode, Win7 system disk repair, login WinPE, but can not modify the system files, looks like the previous Vista that method can not be used. And my method is similar to the login WinPE modification file method. We need an Ubuntu installation CD, and my version is 8.10 Desktop Edition. Select CD startup, enter the Ubuntu installation interface, select the language, and then enter the first "try Ubuntu without changing ...". Then wait for the load file, the time will be slightly longer, after entering the desktop, open the Win7 x:windowssystem32 folder, the "Osk.exe" here cut to other locations, "cmd.exe" renamed to "Osk.exe" and then restarted from the hard disk. You can also try using the Win7 optimization Master software (http://www.txt48.com/soft/17258.html) to the Win7 login window, click the "Easy Access" icon in the lower-left corner of the screen, and then check "Start on screen Keyboard" in the pop-up window and click OK. At this point, the command prompt is started. The rest is very simple, enter the command "NET user" to view the user name, and then enter the command "NET user username new password" can be. Finally, turn off the command Prompt window, in the Login password box to enter the new password just set, see, is not successful into the system! Finally, don't forget to change the files that you previously moved and renamed.