Thanks for the prompt response blutach--
1. Memtest86+2.00 indicates memory is working fine.
Given that everything else remained the same before and after the reboot that software conflicts are unlikely. I did check Software Explorer, and nothing else is running.
2. I did not imply a bug in Imgburn, but requested recommendations for configuration changes, given the endless number of setting interdependencies.
I was hoping for a simple solution perhaps tweaking the Read tab's settings for:
Software Retries
Hardware Retries
I am speculating, but because much of the architecture differs between MS's 32 and 64-bit OSes, that someone might know what causes the difference. Again, it's not XP versus Vista, but 32 versus 64-bit. The mis-compare differences also occur with XP64 bit but not with XP32.
3. If necessary, on Tuesday, I will duplicate the test and send the Imgburn log files.
Is there any other information that might help? Like OS Event Viewer log data?
Again TiA.