Weird, I burned SPM on a Maxell disk to try it out and it was functional; tried it on a Verbatim DVD-R and it says 'Unable to read disk'. WTF?
You could still use the internet and stuff, but don't run anything in the background that uses a lot of memory like a game or something. It would cause the PC to stutter and maybe will glitch the DVD burning program that you are using resulting in a coaster.
its fine to use your computer while burning just dont overuse it that will make it go slow cuz this will affect your burning process