There is a file called "bootroot.loader" that is a normal part of Mac OS X, and that has (apparently) been falsely identified as a decompression bomb at times in the past by Avast. This is not malware. I'm no longer using Snow Leopard, but on Mountain Lion, I find the file at the following path:
After seeking your advise and uninstalling AVAST, I installed Sophos per your instructions and all my issues were magically fixed. I am amazed that AVAST would release software that is bug ridden. After close examination, the "payloads" flagged were being found on Apples DVD (false positives). I over-reacted because of a seperate threat instance. Thanks again for all of your help!
No problem. Unfortunately, there are a lot of anti-virus companies that have flocked to the Mac platform in the wake of the Flashback outbreak, and most of them don't really have a good understanding of the Mac yet. Companies like Avast may be well-regarded in the Windows world, but I'd steer clear of them on the Mac for now. ClamXav and Sophos both have proven track records on the Mac.