I suspect it isn't given it is a dump file that could contain malware signatures and that is the very thing that avast is looking for, virus/malware signatures.
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Hummmm! but I haven't had any issues with mbam, no crashs that I know of, only awhile back got a message to update program that there was an issue on the previous update, which I did. it's been running normal. OK well I did move that file to chest then Deleted it as Asyn siad it was ok to do? Should I also run MS tool to clean all temp files?