Problems that come and go are generally NOT the fault of the software program. While computer software sometimes seems to exhibit human tendencies, that is usually more a result of how we view things than how they actually act.

The point is that a computer program, by its nature, does the same thing every single time. If you experience different outcomes when doing the exact same thing more than once, you should be looking elsewhere for the culprit. Certainly the fact that your adware programs found problems makes me suspicious that your computer may not be 100% hale and healthy.

I'd also be suspicious of the DVD burner, even if it is relatively new. I have only lost one hard disk in twenty-five years, and only one computer motherboard, but I've lost six CD-ROM and DVD drives in the past five years. They are the worst-made component in your computer. They fail all the time, often after burning only a few hundred discs.

Media is also a likely culprit. I always buy top-notch media, but I got curious a few months back and on a whim bought 25 super-cheap, no-brand discs online. The quality of these is unbelievably bad. You can see clear through the darn things. You can actually see defects in the dye, just by looking at them with the naked eye. The dye doesn't even make it all the way to the edge on some discs. Each disc looks different. Take a look at this site, and click on the links that talk about media and DVD burners:

Digital FAQ