Also, if you are using windows XP and you insert a dirty/damaged, or Pink girlish disk, the system will change the way it reads disks (called PIO mode). This can result in Power Calibration errors. The way to check if this is causing some issues is to visit the Device manager and expand the IDE ATA/ATAPI controllers line. Here, select the IDE channel that your CD/DVD writter is on, and right click -> properties. Select the Advanced Settings tab and make sure your device is using Ultra DMA Mode. If not change it and reboot.
If it was using PIO mode, it was liking causing an issue.