stable as can be for me. what all do you have running that could be causing a conflict? Could be something basic like a disk space issue....
auto sandbox won't work without behavior shield though right? Personally I'd rather streamline things and just run Avast fully configured....
If you want to go through tons of details on how to reduce memory and optimize XP then take a look here: http://www.tweakguides.com/TGTC.html...
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