Reading from http://www.google.com/search?hl=en&source=cnet&q=DISABLE+TVDEBUG.LOG that's what I'd try first.
I have recently updated ZoneAlarm to v9.1.007.002, and also installed Avast.
My modest 40Gb hard drive is now being swallowed fast by an Internet Log file in the windows folder, currently standing at 9Gb! Called "tvDebug". (Don't know if its ZA or Avast causing it)
It won't allow me to delete it, and I can't open it to delete its contents. (It says its too big for notepad, and it won't open with anything else either).How do I get rid of it, and how do I prevent it growing again?