Which browser are you using when the script errors occur? What (specifically) do the script errors say? Some differ.
I'm presuming from the settings you disabled, you're experiencing the errors when using Internet Explorer. If so, let us know which version of IE you have installed. Also have a look at what Microsoft has to offer:
How to troubleshoot script errors in Internet Explorer on Windows-based computers
Can you tell us anything more about the audio clip?
Give one more scanner a try.
ESET's Online Scanner - Their FAQ and Help sections should answer any questions you might have. Temporarily disable AVG, prior to running the scan.
I am using a Fujitsu laptop running XP Prof with 2 gb ram, dual processor and have totally cleaned up some adware and fake trojans with AVG, Malwarebytes, Super anti spyware, spybot and rkill. Everything seems fine now except every once in a while, I get an audio clip that sounds like a commercial on tv that only lasts a few seconds. I can't seem to find the source. I am also getting a bunch of script errors. I went to the advanced settings and disabled script debugging and notifications, but they still come in. What am I missing? Thanks.