Error Reporting in Windows XP Professional.
This service gives Microsoft the ability to track and address errors relating to the operating system, components, and applications. The idea behind the service was that Microsoft would be able to track down bugs and fix them more efficiently and quickly.
If this annoys you, then turn it off.
The controls to turn off or customize Windows Error Reporting reside in System Settings, located in the Control Panel. (You can also right-click My Computer and select Properties.) In the System Settings dialog box, select the Advanced tab and then click the Error Reporting button to reveal the Error Reporting dialog box.

