What program do you use to burn the ISO file to DVD?

That's if an upgrade attempt was being made. If booting from disk or a flash drive there's only one option available when mismatched. custom

When going to burn I generally never to worry about what speed anything is at with a 22x dvd burner and simply letting the burning program run at it's own normal speed. I very rarely fling a disk unless the program glitches, the disk is bad, or the data being burned has a problem. The burning speed has never been any problem if the other three factors are all good.

The one thing most don't realize when going to burn any disk especially dvds is the amount of cpu time the burning will request. That puts a good sized tax on that. If you were running a single or lower model dual core mainly slower model you can see how things will get pulled down quite a bit.

With a heftier build and games that are not intrusive to clash with Nero you are sliding by while before you probably see one or the other lock up on you. The one thing I'll say about the other programs mentioned here is that those are lighter in weight as rule when compared to the last newest versions of Nero. You don't see the extras like the secure disk viewer in Eseentials.

Whichever works the best! The one thing often missed surprizingly is simply wondering why a particular program won't burn an iso until finding out that another one is what is actually needed like the ones mentioned here so far.

I use roxio @ max speed.. I never burnt @ 4x or any slow speed and never had any problems with any of my iso's...