1. Open the Device Manager. Begin by clicking Start->Settings->Control Panel:
2. In the Control Panel, double-click System:
3. As an alternative to steps 1 and 2, right-click My Computer on the desktop, and select Properties:
4. A new window named System Properties will appear. Select the Device Manager tab within the System Properties window, and expand the CDROM icon by double-clicking it, or single-clicking the + sign next to it:
5. Highlight the desired drive with a single-click, and open the properties window for that drive by either right-clicking the highlighted drive and selecting Properties or by clicking the Properties button at the bottom left of the window. Alternatively, double-click the desired drive to both highlight it and open the properties window in one action.
6. Select the Settings tab in the Properties window, enter a check in the DMA check-box to enable DMA, and then click the OK button:
7. You may be presented with a warning message. This message is just reminding you to be sure that your drive actually supports DMA. Assuming you have already done your homework and know that it does, press OK:
8. You may be presented with an informational message telling you to change the hardware settings on your drive to match the DMA setting you just made. Virtually all drives that support DMA don't need to have any hardware settings changed to enable DMA in the hardware, but if you need to make a change, do so as directed by the instructions for your drive. Press Yes:
9. If you haven't rebooted yet, you will be presented with a message asking you to reboot. Press Yes:
10. After the computer reboots, open the Properties window for the selected drive again by following steps 1 through 6, and verify that the DMA checkbox is checked:
11. After verifying that the DMA check-box is checked, press Cancel to return to the desktop, and start burning!