HTTP Service Defaults in Windows XP
This service implements the hypertext transfer protocol (HTTP). If this service is disabled, any services that explicitly depend on it will fail to start.
HTTP is a kernel device driver. In Windows XP it won't start until the current user starts it. If the HTTP fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the HTTP service has failed to start.
The following components depend on HTTP:
Restore Default Startup Configuration for HTTP
1. Select your Windows XP edition and service pack, and then click Download.
2. Save the WinXP_HTTP_Service_Startup.cmd file to a local storage device.
3. Run the saved file.
4. Restart the computer.
The HTTP service is using the HTTP.sys file that is located in the %WinDir%\System32\Drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows XP installation media.