I started to get this last week again had been years since I had got it. Was using the best dvds and tried everything that has been tried before. To include changing the writer, checking the memory, Changing my computers power supply and about every software thing I could do to include reloading windows twice. It turned out to be the latest zonealarm extreme program. I could turn off zonealarm and I could burn fine turn it on and Writedvd 10 11 w2 I also could not complete a nero burn its log would say something about a memory problem. Zonealarm was not updating or running a check for virus at the time either. I did a clean uninstall of zonealarm reloaded clonedvd again and went back a few loads on zonealarm extreme and it worked. I am now up to the zonealarm 9.0.108 and it is fine. Have not went to the latest. 9.0.104 but I think it will work fine also I think it was something to do with the install of latest zonealarm extreme that caused the problem. Going to wait a while before reloading 9.0.104 just in case. My computer is not a slow computer either. Operating System System Model Windows XP Professional Service Pack 3 (build 2600) Enclosure Type: Desktop Processor a Main Circuit Board b 2.60 gigahertz AMD Athlon 64 X2 Dual Core 128 kilobyte primary memory cache 512 kilobyte secondary memory cache Board: C51GM-M Bus Clock: 201 megahertz BIOS: Phoenix Technologies, LTD 6.00 PG 08/28/2007 Drives Memory Modules c,d 500.11 Gigabytes Usable Hard Drive Capacity 175.88 Gigabytes Hard Drive Free Space PIONEER DVD-RW DVR-111L [CD-ROM drive] 3.5" format removeable media [Floppy drive] Generic USB CF Reader USB Device [Hard drive] -- drive 2 Generic USB MS Reader USB Device [Hard drive] -- drive 4 Generic USB SD Reader USB Device [Hard drive] -- drive 1 Generic USB SM Reader USB Device [Hard drive] -- drive 3 WDC WD5000AAKS-75A7B0 [Hard drive] (500.11 GB) -- drive 0 3456 Megabytes Installed Memory Slot 'A0' has 2048 MB Slot 'A1' has 2048 MB Slot 'A2' is Empty Slot 'A3' is Empty Was using a pioneer d116 changed it out to d111 trying to find the problem. Just thought I would share this with you all.