I took another look at some of your older threads/posts. It looks as though you eventually did a system restore and said all was ok again...for a while anyway. One more reason I doubt this is a hardware problem.
First off, uninstall sonic as rog, signals and I have suggested.
Now uninstall your optical drive(s) [HP DVD840] in device manager. Since you've had ongoing issues, let's go one more step.
I know you said you checked this, but if you could post a screenshot of your DMA settings, it would be helpful.
Your burner(s) should be in UDMA-2 (most likely) and your hdd(s) in UDMA-5 or 6.
Please read the More DMA Help article...link in my sig. It does a great job of troubleshooting and explaining this stuff.
After the uninstall > power off > physically unplug your optical drives > power up > power down again > replug the drives > power up...window will reinstall your burners and assign appropriate drivers.
Back to nero, there are some basic tests that you can do without a ton of data analysis. Some burners won't do all these tests. I think your hp is a Liteon or LG...I'm not sure. HP doesn't make this easy! The suffix (eg., b, i, etc.,) is apparently just used to assign the appropriate firmware. You should be able to see the oem on the burner itself if you open the case...label?
nero 2&3: Basic benchmark testing looking at burned media.
Yellow line = disc rotation speed (rpm)
Green line = transfer speed
You can see that in both tests, done on a Liteon and Benq respectively, these graphs are nice and clean...indicative of consistent speed and data transfer.
nero 3B (borrowed form geno888...thanks geno!)
Not so good!