Pros: Sure, if you have Avast already installed on your system, this works. But why would anyone just want to download the update if you already had it installed on your computer?
Cons: This is an .exe file. It will extract the definition update if you already have avast installed. Alas, all I need is the definitions to update the emergency disk but I can't because it's an .exe file.
Other Thoughts: Will someone actually upload the actual file without the .exe file that checks for avast first?