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Internet Explorer keeps track of the Web sites that you or anyone using your computer accesses. The sites are listed by URL on the History bar and are kept for 20 days by default (you can change the default setting on the General tab of Internet Options). The idea behind maintaining a history of visited sites is to enable you to find Web sites you have accessed but cannot remember their URLs, have not saved in your Favorites menu, or that are buried so deeply within a complex Web site you can t find your way back to them a second time. Also, the History bar enables you to see which sites other users are accessing when they use your computer. You can display the History bar by clicking the History button on the toolbar, as shown in Figure 6-24. By clicking on the day and week categories to expand them, you can see the sites that have been accessed during those periods.

Do not edit the registry unless you have no alternative. The Registry Editor bypasses standard safeguards, allowing settings that can damage your system or even require you to reinstall Windows. If you must edit the registry, back it up first.

To disable startup programs by using the Group Policy snap-in 1. In the Run dialog box, type gpedit.msc and then click OK. 2. Under Local Computer, click the plus sign (+) to expand either of the following:

3. Expand Administrative Templates, expand System, and then click Logon. 4. Double-click the Group Policy setting Run these programs at user logon. 5. For the programs that appear in either registry subkey that shows in Table 29-6, do one of the following:

6

To disable all the programs that are listed in the following subkeys, click Disabled. Disabling this Group Policy deletes the computer or user Run subkey described in Table 29-6.

To selectively disable individual programs that are listed in the computer or user Run subkey, click Enabled, and then click Show. In the Show Contents dialog box, select a program to disable, and then click Remove. If you enable the preceding Group Policy settings, the programs listed in the corresponding registry subkeys no longer start automatically when a user logs on to the system.

Figure 6-24.

29:

52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 } } public override void Display() { Console.WriteLine(Name + is at level + Level.ToString() + and has a salary of : + Salary.ToString() + $ ); Console.WriteLine( His address is: ); Console.WriteLine(Address); Console.WriteLine(City + , + State + + ZIP); Console.WriteLine(Country); { public int Level; public int Salary; public class Employee : Person

Table 29-6

Group Policy Run List Controlled by the Group Policy Setting Run these programs at user Setting logon Computer User HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run

The History bar is a simple feature, but there are a few important points to remember:

Change additional Group Policy settings to simplify your computer configuration when you are troubleshooting startup problems. Table 29-7 lists the registry subkeys that are controlled by the Group Policy setting Do not process the run once list. If you enable this Group Policy setting, the system ignores the programs listed in the following RunOnce registry subkeys the next time a user logs on to the system.

Table 29-7

RunOnce List Managed by the Group Policy Setting Do not process the run once list HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

G You can delete history items individually by right-clicking them and click-

Table 29-8 lists the computer registry subkey that is controlled by the Group Policy setting Do not process the legacy run list. Listed in this registry subkey are a customized list of programs that were configured by using the system policy editor for Windows NT 4.0 or earlier. If you enable this Group Policy setting, the system ignores the programs listed in the corresponding registry subkey when you start your computer. If you disable or do not configure this Group Policy setting, the system processes the customized run list that is contained in this registry subkey when you start the computer.

Table 29-8

Group Policy Customized Run List Controlled by the Group Policy Setting Do not process the Setting legacy run list Computer HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

ing Delete. You can clear the history from an entire day or week by rightclicking the category and clicking Delete. You can also delete all history items by clicking the Clear History button on the General tab of the Internet Options dialog box.