We have an MCP (multi-chip programmer) device for programming eeprom chips. It connects to a pc via an LPT1 printer port. We have the device confirmed working on an old Dell laptop we have, but want to use this device with a HP 8300 desktop computer. The desktop has no device errors for the printer port. We have all drivers installed and the port is connected via an integrated cable to mother board. We are running windows xp and windows 7 had same issues with both OS. Intel mother board. Not sure what other info would be required? Been smashing head into wall for 2 days now on this. Please Help!