Mobad.
It has only just occured to me. The .daa mat be a red herring.
Try this:
Start/ Contol Panel/ System
Press the '+' sign next to IDE ATA/ATAPI devices
Right click on Primary IDE Channel / properties
Press advanced settings tab
Make sure any drives (Device 0 / Device 1) are using DMA as the current transfer mode.
If they are 'PIO only' then windows has automatically set the way it I/0's data to its basic level. This causes buffer problems when you burn discs.
What you need to do to fix this is the following:
Right click and delete on the offending channel (Primary/Secondary). Do not worry! This does not delete any data or srew up your install. After you have uninstalled it, you can either press the scan for hardware changes button, or restart the PC, and it should automatically install and enable DMA mode. Then your burning should be much easier.
Check the same for Secondary IDE Channel (this is where your DVD RW is most likely attached to).
Hope it helps.
Get back to me.