Tell us as much about your system as possible and then describe the problem.

CPU (speed)
RAM (amount and type)
Mobo (brand, bios and driver version)
Graphics card (brand and driver version)
Sound Card (brand and driver version)
Modem (brand and connection type)
PSU Power rating
DVD/CD-ROM (with firmware driver)
CD/DVD Burner (with firmware driver and software used for copying)
Hard-Drives (make, model and size)
Keyboard and mouse types
Direct X version number
Resource amount on start-up only please

The more detail you can supply, the easier it is to locate the problem.

Thanks.