I too have exactly same problem with SAS and Avast.
Uninstalled SAS, and Avast got quiet.
I do suspect it's Avast who causing the problem and not SAS,
because I only run SAS once a week, and today was the day.
I didn't even get a chance to start it.
Ignored the warning, restarted, and now Avast really gets mad.
Moved to chest, and now SAS didn't work.
I use Vista Home Premium.
Avast was fully updated.
I want to know if or when it's OK to install SAS again.