Windows XP operating system Logon account 10 problems

　　Editor's note:Windows XP is an operating system that supports multiple users. We have many questions about its logon and account. Recently, many friends in the Forum mentioned that some of them are preliminary problems, there are some common examples. In order to give readers of it168 a clear understanding of Windows XP account management, logon problems, and some questions about account usage, we have invited an experienced author to write such a FAQ, hoping to help you better understand Windows XP.

1. Why does a guest appear in the computing account?

By convention, you should first answer this friend's question. It is normal that guest appears in the user account, so you do not have to worry about the intrusion of your computer. The so-called "guest" literally means "guest", which is available in both Windows and Linux. This account has much lower permissions than administrator permissions. According to Windows XP's classification of account groups, we can see that administrators (the highest Control Right for computers) and Backup Operators (which can replace security restrictions in order to generate or restore files), guests (with the same access permissions as the uers group, but more restrictions), power uers (with most of the management permissions, but also restrictions, can run verified applications, you can also run earlier versions of applications) and uers (users cannot make intentionally or unintentionally changes, you can run proven files, but cannot run most old applications) remote Desktop uers (with the permission to remotely log on ).

Figure 1

In Windows XP, you can also disable the Guest account by selecting "Start> set> Control Panel> User Account" and clicking "guest ", in the displayed window, click "disable guest account ".

Figure 2

2. Why is an ASP. NET account added to the computer account?

The guest in your account is sparse and common, but if one day you have an ASP. NET account in your account, will you feel cold sweat? You don't have to worry about it. This account is installed on Microsoft. net Framework is automatically created to enable ASP in Microsoft Internet Information Service. net workers fully support ASP. net, for ASP. NET developers, we can delete them quickly.

Of course, if you delete it, you may need to run it. net Framework software driver, unexpected problems may occur, we can run "% SystemRoot %/Microsoft.. Net/framework/vxxxx/aspnet_regiis.exe/I "to rebuild (xxx indicates the version number ).

3. Why can't I enter a user name when logging on to Windows XP? You can only select an account already exists.

From Windows XP, the system uses the welcome mode logon interface by default. If you want to log on to another user (such as the administrator account) on the welcome screen ), press ALT + DEL + ctrl twice.

If you want to use a traditional logon mode (similar to Windows 2000 logon mode), select "Start> set> Control Panel> User Account ", click "Change User Logon or logout method ".

Figure 3

Deselect "use welcome screen" and click "application options ".

Figure 4

In this way, when you log on to Windows XP, you can enter an existing account in the username in the logon box and enter the password of the account to complete the logon.

4. I often log on to the administrator account for some computer management. Is there a way to add the Administrator account to the welcome screen?

By default, the Windows XP welcome screen account list does not contain the administrator account. You can add the Administrator account to the account list as follows:

Run the "Regedit" command to open the Registry Editor. First, locate "[HKEY_LOCAL_MACHINE/software/Microsoft/Windows NT/CurrentVersion/Winlogon]". in the window on the right, find "logontype" (If NO, create a new one, whose type is REG_DWORD) and set its value to 1, next, go to [HKEY_LOCAL_MACHINE/software/Microsoft/Windows NT/CurrentVersion/Winlogon/specialaccounts/userlist], and create an item named "Administrator" under it, set the default value to 1.

You can add other accounts to the account list on the welcome screen in a similar way. If you delete the entry named after the account name under the Registry branch or set its default value to 0, you can remove it from the list of welcome screen accounts, which is good for privacy protection.

5. Why does my Windows XP access the system directly? I remember that I have set the administartor password.

In this case, you must have enabled the Windows XP welcome logon mode. The possible cause of this problem is: you have not set the user password you added when installing Windows XP, and you have not enabled the guest access permission. In this way, you only need to set a password for your user, select "Start> set> Control Panel> User Account" to enable Guest access for guest.

If the setting is invalid, You need to retrieve the "disappear" Welcome screen. We can create an account or set a password for an existing account. If the problem persists, run the "Regedit" command to open the Registry Editor, go to [KEY_LOCAL_MACHINE/software/Microsoft/Windows/
CurrentVersion/policies/explorer] "branch, find nowelcomescreen in the right window (if not, create a new one, whose type is DWORD), and change its value to 0.

6. I am using my computer, but another friend suddenly wants to use my computer. I have already set up a user for him. I don't want him to use my account, but I don't want to disable the running BT download. Can this be implemented?

Of course, the answer is yes. Windows XP provides the "quick User Switch" function, which allows us to log on to another user interface without logging off the current user. The procedure is as follows:

Select "Start> set> Control Panel> User Account", click "Change User Logon or logout mode", and select "use welcome screen" and "use Quick User Switching.

Next, press ALT + DEL + ctrl to open the task manager, select the "Shut down> switch user" menu (or press win + L directly), and then log on to your friend's account.

Figure 5

Note that if you want to use the "quick User Switching" function, you must enable "use welcome screen". Otherwise, this function is not available.

7. I use the traditional logon mode. Due to habits, every time I want to open the task manager, I press ALT + DEL + ctrl, but every time you click the mouse again (click "Task Manager"), is there any faster way? I used Windows 98/Windows 2000 to press ALT + DEL + ctrl to open the task manager?

You can try Ctrl + Shift + Esc. In fact, this hot key is the real hotkey for calling task management. Whether or not you have enabled the welcome mode, you can use this hot key to directly open the task manager. If you are not used to them, it doesn't matter. You can right-click the taskbar and select the "Task Manager" menu. The effect is the same.

In fact, there are still a lot of hotkeys related to logon and account. The most useful one is win + L. If you have enabled the welcome mode and the quick user switch function, press win + L to quickly switch users. If you have not enabled the quick user switch function, no matter whether you have enabled the welcome mode or not, the win + L hotkey is used to lock the computer. If your current user has set a password, you must enter the password when re-using the computer, if no password is set, press enter to return.

8. I didn't set a password for Windows XP, but I had to enter a password every time I log on. In fact, I only needed to press enter to enter the system. I hate to press enter every time, can I directly access the system? I remember it was easy to set in Windows 2000?

There are many implementation methods. Let's first introduce how to modify the registry:

Run the "Regedit" command to open the Registry Editor and expand "[HKEY_LOCAL_MACHINE/software/Microsoft
/Windows NT/CurrentVersion/Winlogon] branch, double-click DefaultUserName in the right window, and enter your login username. If no value exists, create a new string value. Be sure to distinguish uppercase and lowercase letters.

Next, double-click defaultpassword in the right window, and enter your password in the blank column. If "defaultpassword" is not found, create a new one. Next, double-click "AutoAdminLogon" in the right window and set the value to "1 ". If "AutoAdminLogon" is not found, you can follow the steps above to create a logstore.

Next we will introduce a simpler method:

In "Start> Run", enter "rundll32 netplwiz. DLL, usersrundll "command, press enter to bring up the" User Account "window, then deselect the" to use the local machine, the user must enter the user name and password ", click" OK ".

Figure 6

In the pop-up window, enter the account and password you want to automatically log on.

Figure 7

9. The method described above is really good. But is it too troublesome to enter such a long command every time? Windows 2000 control panel has a User Password function. Why is it unavailable in Windows XP? Why not?

Yes, Windows 2000 does, but Windows XP hides this component. Fortunately, we can add it in the control panel by ourselves. The method is also very simple. Just save the content as *. Reg and import it:

Windows Registry Editor Version 5.00

[Hkey_classes_root/CLSID/{98641f47-8c25-4936-bee4-c2ce1298969d}]
@ = "Password Account Management"

[Hkey_classes_root/CLSID/{98641f47-8c25-4936-bee4-c2ce1298969d}/defaulticon]
@ = "% SystemRoot % // system32 // nusrmgr. CPL, 1"

[Hkey_classes_root/CLSID/{98641f47-8c25-4936-bee4-c2ce1298969d}/Shell]

[Hkey_classes_root/CLSID/{98641f47-8c25-4936-bee4-c2ce1298969d}/Shell/Open]

[Hkey_classes_root/CLSID/{98641f47-8c25-4936-bee4-c2ce1298969d}/Shell/Open/command]
@ = "Control userpasswords2"

[HKEY_LOCAL_MACHINE/software/Microsoft/Windows/CurrentVersion/Explorer/
Controlpanel/namespace/{98641f47-8c25-4936-bee4-c2ce1298969d}]
@ = "Add userpasswords2 to control panel"

Double-click "password Account Management" in the control panel to open it. What can we do?

· Reset the password. Select a user and Click Reset Password.
· Add a new user. Click "add" and then follow the wizard.
· Manage passwords. For example, if you want to clear your MSN Messenger login password, switch to the "advanced" tab, click "manage password", and then delete it.
· Enhanced security. Friends who have used Windows 2003 Server know that before each login, we need to press ALT + DEL + Ctrl, so that some Trojans can be accessed, Windows XP can also do the same, click "Ask the user to press Alt + Ctrl + Delete.

Figure 8

10. My Windows XP password is lost and cannot be logged on. There are many important things in it ...... What should I do?

It's not that easy to solve this problem. from Windows NT/2000/XP/2003, account management has a security account manager) the Security Account Manager manages user accounts through Security Identifiers.

Each Sid is generated when we add an account to the system. It consists of four parts: Security description of users and groups, issuer of the logo, revision, and variable verification value, it is stored in a system file named "Sam" without a suffix (Figure 1, its location is % SystemRoot %/system32/config/SAM ). Once we delete this account, the corresponding Sid is also deleted, and it is unique, that is, even if we create another account immediately, the newly generated Sid values are different. Windows logon relies on Sid verification.

After understanding this principle, let's correct two kinds of errors:

I,Some people think that they can log on normally after deleting the Sam file. Do not try this method. It is only applicable to the original version of Windows 2000. It is not applicable to Windows XP and may cause system lock failures, for Windows XP/2003, you can try to copy the Sam file in the C:/Windows/Repair Directory to the C:/Windows/system32/config directory, back up the C:/Windows/system32/config/SAM file before overwriting. However, you cannot rescue files encrypted with EFS.

II,Some users say they can use another account to log on and try again. This is good, but you cannot rescue files encrypted with EFS.

So how can we solve this problem? We can use a software named @ Stake LC4 to crack the username and password information stored in the SAM file. The advantage of this method is that it can perfectly solve the problem of forgetting the password, even files encrypted with EFs in the administrator account can be accessed without data loss. However, if the password you set is too complex, this software takes a long time to compute, which requires you to be patient.

Run @ Stake LC4, select "File> new session", select "Import> import from Sam file", and locate the X:/Windows/system32/config/SAM file, at this time, we will see that LC4 will display all the account names (user name), domain (domain) and other information of all accounts in the local machine.

If the password of an account is blank, you can see "* empty *" in the "password" of the account *".

Next, select the account for which you want to crack the password, and select "session → begin audit" to start cracking. The length of time it takes depends on the length of your password. Select "File> export Password File" to save the result to a text file. view the text file to obtain the administrator password.

It168.com/ninjai