To configure TCP/IP for automatic addressing

1. Open Network Connections.
2. Right-click the network connection that you want to configure, and then click Properties.
3. On the General tab (for a local area connection) or the Networking tab (all other connections), click Internet Protocol (TCP/IP), and then click Properties.
4. Click Obtain an IP address automatically, and then click OK.

Notes

* To open Network Connections, click Start, click Control Panel, and then double-click Network Connections.
* You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings might also prevent you from completing this procedure.
* Windows XP uses Automatic Private IP Addressing (APIPA) to automate Internet Protocol (IP) configuration of network connections.

By default, the computer first tries to contact a DHCP server on the network and dynamically obtain configuration for each installed network connection, as follows:

o If a DHCP server is reached and leased configuration is successful, TCP/IP configuration is completed.
o If a DHCP server is not reached after approximately 60 seconds or leased configuration fails, the computer uses the setting on the Alternate Configuration tab to determine whether to use APIPA for automatic TCP/IP configuration or to configure TCP/IP with the alternate configuration. When APIPA is used, Windows XP uses an address in the APIPA IP address range (169.254.0.1 through 169.254.255.254) and the subnet mask is set to 255.255.0.0.The range of IP addresses (from 169.254.0.1 through 169.254.255.254) used for APIPA is reserved by the Internet Assigned Numbers Authority (IANA). Any IP addresses within this range are not used on the Internet.

To disable automatic address configuration

1. Open Registry Editor.

Caution

* Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer. You can also use the Last Known Good Configuration startup option if problems are encountered after manual changes have been applied.
1. In Registry Editor, navigate to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters

3. Create the following entry:

IPAutoconfigurationEnabled: REG_DWORD

4. Assign a value of 0 to disable Automatic Private IP Addressing (APIPA) support.

Notes

* To open Registry Editor, click Start, click Run, type regedit, and then click OK.
* You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings might also prevent you from completing this procedure.
* If the IPAutoconfigurationEnabled entry is not present, a default value of 1 is assumed, which indicates that APIPA is used.

To specify disconnect times

You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings might also prevent you from completing this procedure.

1. Open Phone and Modem Options in Control Panel.
2. On the Modems tab, click the modem you want to configure, then click Properties.
3. Click the Advanced tab, and then click Change Default Preferences.
4. On the General tab, under Call preferences:

To


Do this

Automatically disconnect when a connection is not used for a specified time.


Select the Disconnect a call if idle for more than check box, and then type the number of minutes the modem should wait before disconnecting.

Change the time allowed to make a new connection.


Type the number of seconds in Cancel the call if not connected within.

Notes

* To open Phone and Modem Options, click Start, click Control Panel, and then double-click Phone and Modem Options.
* Note that these are the default settings. If these parameters are specified by an application program, the program's settings will take precedence.If you are using a network connection, the disconnect time is determined by the redialing options for the network connection, rather than by the setting in the modem's properties. For information about configuring a connection, click Related Topics.

To specify what Windows does if the system stops unexpectedly

You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings might also prevent you from completing this procedure.

1. Open System in Control Panel.
2. On the Advanced tab, under Startup and Recovery, click Settings.
3. Under System Failure, select the check boxes that correspond to the actions you want Windows to perform if a Stop error occurs:
* Write an event to the system log specifies that event information will be recorded in the system log.
* Send an administrative alert specifies that your system administrator will be notified.
* Automatically reboot specifies that Windows will automatically restart your computer.
4. Under Write Debugging Information, choose the type of information you want Windows to record when the system stops unexpectedly:
* Small Memory Dump records the smallest amount of information that will help identify the problem. This option requires a paging file of at least 2 MB on the boot volume of your computer and specifies that Windows will create a new file each time the system stops unexpectedly. A history of these files is stored in the directory listed under Small Dump Directory.
* Kernel Memory Dump records only kernel memory, which speeds up the process of recording information in a log when the system stops unexpectedly. Depending on the amount of RAM in your computer, you must have 50 MB to 800 MB available for the paging file on the boot volume. The file is stored in the directory listed under Dump File.
* Complete Memory Dump records the entire contents of system memory when the system stops unexpectedly. If you choose this option you must have a paging file on the boot volume large enough to hold all of the physical RAM plus one megabyte (MB). The file is stored in the directory listed under Dump File.

Notes

* To open System, click Start, click Control Panel, and then double-click System.
* You must have at least a 2-MB paging file on the computer's boot volume if you select Write an event to the system log or Send an administrative alert.
* If you choose either Kernel Memory Dump or Complete Memory Dump and select the Overwrite any existing file check box, Windows always writes to the same file name. To save individual dump files, clear the Overwrite any existing file check box and change the file name after each Stop error.
* You can save some memory if you clear the Write an event to the system log and Send an administrative alert check boxes. The memory saved depends on the computer, but typically about 60 KB to 70 KB are required by these features.
* If you contact Microsoft Product Support Services about a Stop error, they might ask for the system-memory dump file generated by the Write Debugging Information option.