Can't unzip the file

I just downloaded the arduino operting evironment "version 10" (painful on dialup), and I can't unzip the file. I am using cam unzip and it says it is the final disk in a backup file and I need to insert the first disk????

Please Help,

Thanks,

Sounds like your download did not complete (or was corrupted).

If you're on dialup, you probably want a tool like filezilla to help you restart where you left off in the event of an interrupted download.

-j