"I don't understand about the drive transfer mode, didn't see anything like that"
In Device Manager / IDE Controller properties there are three lines for each device:
Device Type: "Fastest possible" on your pc? My pc is "auto detection"
Transfer Mode: Should be "DMA if available"
Current Transfer Mode: Should be "UDMA Mode 2" or mode 4.
I don't know whether Device Manager has different configurations and yours is not the same as mine. I've never seen anything but the above. Anyone?
"I have also tried updating"
If you were referring to the drivers, quite likely there are no updates. If you are referring to the firmware, given the fact the drive used to work with Memorex and does not now, that was a long shot. Only likely to make a difference in this case if the drive was really borderline to start with. Firmware updates help mostly when there is a new media on the market eg burner was made for 8x write and now 16x blanks are available.
The problem you have is most likely with the dvd drive, not your pc (assuming the IDE data transfer mentioned above is OK). You could try downloading
Nero DVD Speed. The Disc Info and Disc Quality tests may give some insight.
As I said earlier, I would try burning at a slower speed and see if that works. Ultimately you may have to replace the drive.
Starman*