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Configuring Startup and Troubleshooting Startup Issues : The Process of Troubleshooting Startup (part 3) - Troubleshooting Startup Problems After Logon

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6/7/2013 4:41:15 PM

3. Troubleshooting Startup Problems After Logon

If your computer fails immediately after a user logs on, use the process illustrated in Figure 9 to identify and disable the failing startup application to allow the user to log on successfully. If the problem occurs immediately after updating or installing an application, try uninstalling that application.

Follow this process to troubleshoot startup problems that occur after logon.

Figure 9. Follow this process to troubleshoot startup problems that occur after logon.

How to Temporarily Disable Startup Applications and Processes

If a problem occurs after installing new software, you can temporarily disable or uninstall the application to verify that the application is the source of the problem.

Problems with applications that run at startup can cause logon delays or even prevent you from completing Windows startup in normal mode. The following subsections provide techniques for temporarily disabling startup applications.

HOW TO DISABLE STARTUP APPLICATIONS USING THE SHIFT KEY

One way you can simplify your configuration is to disable startup applications. By holding down the Shift key during the logon process, you can prevent the operating system from running startup programs or shortcuts in the following folders:

  • %SystemDrive%\Users\username\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

  • %SystemDrive%\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup

To disable the applications or shortcuts in the preceding folders, you must hold down the Shift key until the desktop icons appear. Holding down the Shift key is a better alternative than temporarily deleting or moving programs and shortcuts, because this procedure affects only the current user session.

To use the Shift key to disable applications and shortcuts in startup folders, log off the computer and then log on again. Immediately press and hold down the Shift key. Continue to hold down the Shift key until the desktop icons appear. If you can log on successfully, you have isolated the cause of the problem to your startup applications. Next, you should use the System Configuration utility to temporarily disable applications one by one until you identify the cause of the problem. With the cause of the problem identified, you can fix the application or permanently remove it from your startup programs.

HOW TO DISABLE STARTUP PROGRAMS USING THE SYSTEM CONFIGURATION UTILITY

The System Configuration utility allows you to disable startup applications individually or several at a time. To disable a startup program by using the System Configuration utility, follow these steps:

  1. Click Start, type msconfig, and then press Enter.

  2. You can disable all or selective startup applications:

    • To disable all startup applications, click the General tab, click Selective Startup, and then clear the Load Startup Items check box.

    • To disable specific startup items, click the Startup tab and then clear the check boxes that correspond to the items you want to disable temporarily. You can also click Disable All on the Startup tab to disable all items.

To change a startup setting permanently, you must move or delete startup shortcuts, change a Group Policy setting, or uninstall the application that added the startup application.

HOW TO DISABLE STARTUP APPLICATIONS CONFIGURED USING GROUP POLICY OR LOGON SCRIPTS

You can use the Group Policy snap-in to disable applications that run at startup. Local Group Policy can be applied to computers, in which case you need to edit the Group Policy settings on the computer that you are troubleshooting. Group Policy objects (GPOs) are frequently applied within AD DS domains, in which case you need to connect to the domain to edit the appropriate policy. Before modifying domain Group Policy settings, you should follow the steps described later in this section to disconnect the computer you are troubleshooting from the network to determine whether the problem is related to domain Group Policy settings.

To disable startup applications by using the Group Policy Management Editor snap-in, follow these steps:

  1. Click Start, type gpedit.msc, and then click OK.

  2. Within either Computer Configuration (for computer-wide startup applications) or User Configuration (for user-specific startup applications), expand Policies, expand Administrative Templates, expand System, and then click Logon.

  3. Double-click Run These Programs At User Logon, which is a Group Policy setting. Next, do one of the following:

    • To disable all startup applications configured by that policy, click Disabled.

    • To selectively disable individual programs that are listed in the computer-specific or user-specific policy, click Show. In the Show Contents dialog box, select a program to disable and then click Remove.

You can change additional Group Policy settings that might help you simplify your computer configuration when you are troubleshooting startup problems by enabling the Do Not Process The Run Once List policy. If you enable this Group Policy setting, the computer ignores the programs listed in the following RunOnce subkeys the next time a user logs on to the computer:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

Additionally, you can enable the Group Policy setting Do Not Process The Legacy Run List to disable the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run subkey that startup applications might use. The programs listed in this subkey are a customized list of programs that were configured by using the System Policy Editor for Windows NT 4.0 or earlier versions. If you enable this Group Policy setting, Windows ignores the programs listed in this subkey when you start your computer. If you disable or do not configure this Group Policy setting, Windows processes the customized run list that is contained in this registry subkey when you start the computer.

Group Policy changes do not always take effect immediately. You can use the Gpupdate (Gpupdate.exe) tool to refresh local Group Policy changes to computer and user policies. After you refresh the policy, you can use the Group Policy Result (Gpresult.exe) tool to verify that the updated settings are in effect.

Group Policy settings can be applied locally or to an entire domain. To determine how settings are applied to a specific computer, use the Resultant Set Of Policy (Rsop.msc) tool. Then, edit those Group Policy objects to apply a change. For the purpose of isolating the source of the problem, you can prevent Group Policy, logon scripts, roaming user profiles, scheduled tasks, and network-related issues from affecting your troubleshooting by temporarily disabling the network adapter and then logging on by using a local computer account.

If local and domain Group Policy settings do not reveal the source of the startup problem, the application may be started by a logon script. Logon scripts are configured in the local or domain user properties. To view the logon script, open Computer Management and then view the user's properties. Then click the Profile tab. Make note of the path to the logon script and edit it in a tool such as Notepad to determine whether any startup applications are configured. 

How to Permanently Disable Startup Applications and Processes

You can permanently disable a startup application in several ways, explained in the following sections.

UNINSTALL THE APPLICATION

If you find that recently installed software causes system instability or if error messages consistently point to a specific application, you can use Uninstall A Program under Programs in Control Panel to uninstall the software. If the application is required, you can install it in a lab environment and perform additional testing before reinstalling it on production computers.

MANUALLY REMOVE THE ENTRY

You can manually delete shortcuts from the Startup folder, remove startup entries from the registry, remove entries from Group Policy or logon scripts, or disable a service. 

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