alanrf -
I assume that your request for more info was in response to my orig post. If so, that config is long behind me and I can't provide any additional info.
But as a note, on my second (successful) attempt to replace AVG with AVAST my uninstall procedure was (1) use the normal AVG uninstall, (2) go through the C: files and remove all remnants of AVG in the file system, and (3) go through the VISTA Registry and remove all AVG entries there. After that AVAST was installed and all was well.
avastrb