Emulator Problem: Day one Problem

Hi, so I thought the best way to introduce myself is by asking for help with a problem I seemed to incur straight away. As I have tried this with several emulator downloads on the site already I don't seem to be able to download or access a single one?? My PC starts to download an emulator then almost immediately follows with this message:

Adobe Reader could not open "Emulator zip file" because it is either not a supported file or because the file has been damaged (For example, it was sent as an email attachment and wasn't correctly decoded.

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So, how do I fix this?

Thanks for the help (name escapes me) downloaded WinZip, which instantly resolved the problem. Many thanks.