What should I do if I forget my user name and password after I start my computer?

Method 1)
Restart the computer and press CTRL + ALT at the same time when the system logon interface is started. Then, press del twice to display a new logon interface, enter the "Administrator" password in the username field. Press enter to log on. After logon, open the control panel and select/user account/change account/click the original "account name"/change my password/enter the new password and enter the new password again, click "Change Password.

If the computer administrator password is forgotten, use either method 2 or method 3 or method 4.

Method 2)

1. restart the computer, press F8 after the computer is started, and wait until the advanced option screen appears. Then, release the computer, select "safe mode of command prompt", and press Enter.
2. At the end of the running process, the system lists the system Super User "Administrator" and the local user "*****" selection menus. Click "Administrator ", enter the command line mode.
3. type the command "Net user ***** 123456/Add" and change the "***" user's password to "123456 ". To add a new user (for example, the user name is abcdef and the password is 123456), enter "Net user abcdef 123456/Add ", after adding the account, run the "net localgroup administrators abcdef/Add" command to promote the user to the system management group "Administrators" and grant it super permissions.
4. restart the computer and select "run in normal mode". Then, you can use the changed password "123456" to log on to the "*****" user.

Method 3)
Use Windows XP to install the CD to fix the system and crack the Super Computer Administrator password.
Step 2: enable the system as a disc and place it on the system installation disc. After the first selection interface appears, press Enter. After the second selection interface appears, press the "r" key to start the installation. Then the installer checks the disk and starts copying files. After the file is copied, the system restarts automatically.
Step 2: After the restart, the system will enter the graphical installation interface. Note: pay close attention to the lower left corner of the interface. Once the progress bar "installing devices" appears, press SHIFT + F10 ". Then unexpected events will occur, and a command prompt window will appear in front of us. This is the key to password cracking.
Step 2: Type "lusrmgr. msc" in the Command Prompt window and press enter (excluding double quotation marks) to open the "local users and groups" management tool. Click "user" on the left, right-click the Administrator account on the right, and select "set password ". A warning window is displayed. After the password is changed, some information in the system becomes inaccessible. This mainly refers to files encrypted with EFS. If the certificate has not been exported before, these files will not be accessible after the password is changed. If the file does not exist, ignore it. Click continue, enter the new password, and click OK. Close the "local users and groups" and "command prompt" windows, and continue to complete the repair and installation. After the installation is complete, the system administrator account will be "activated" again.

Method (4)
Countermeasure in WINXP/2000: Delete the Sam file under \ system32 \ config in the system installation directory and restart the system. At this time, the Administrator account no longer has a password, and log on to the system with the administrator account, you do not need to enter any password. after entering the system, you can reset the Logon account password.

If the CMOS password is forgotten:
Buckle the motherboard battery, and wait for 10 minutes to reinstall it.

Cancel the CMOS password without discharge:
1. Run CMD and press enter to open the command prompt. Enter debug and press Enter.
2. Enter "O 70 10" and press enter (note: the input is an English o, not a number 0, there is a space between O and 70, and there is a space between 70 and 10 ).
3. Enter "O 71 10" and press enter (note: the input is an English o, not a number 0, there is a space between O and 71, and there is a space between 71 and 10 ).
4. Enter "Q" and press Enter.
5. restart the computer and clear the CMOS Password (the above double quotation marks are not entered ).

What should I do if I forget my user name and password after I start my computer?