nero sonic conlict

I recently purchased an hp media center.I use windows xp .i installed nero 7 and found when burning dvds that i would get a 1 second stutter during playback.i do not receive any message errors.i contacted hp and they tell me nero is not supported by this dvd burner(hp 840b) ,they did suggest a more recent firmware which i downloaded hi86 .this firmware was supposed to fix compatability with nero and sonic (sonic came with the pc).after trying hi86 i received the same problem.i then uninstalled nero and used sonic and get the same result.these are little 1 second stutter thats occur at various points during playback,they vary from 10 to 13 minutes apart.picture quality is fine ,audio is fine and burning cds is not an issue.just these frustrating 1 second stutters.i do have dvd decrytor and dvd shrink on my drive as well.i have since uninstalled sonic and have nero 7 installed and am still getting the same result.
in addition i have now done the following.
uninstalled both and cleaned after uninstall.i then reinstalled Nero and appear to have the same result.i am burning something that i ripped while i had both sonic and Nero on my computer useing DVD Shrink.is it possible the issue happened in the ripping even though i dont see it when watching the original during playback or are there any other suggestions.

 

This is a multi-post. Was asked at the link below. Reported to mods.

http://forums.afterdawn.com/thread_view.cfm/329393